Gen 2 Hidden Power Calculator

Unlock the full potential of your Pokémon’s Hidden Power in Generation 2 games!

Calculate Hidden Power

Your Pokémon’s Hidden Power

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Hidden Power is determined by the last 4 bits of a Pokémon’s Individual Values (IVs).
The Type is determined by the last bit of the Attack IV.
The Power is calculated as: 3 + (2 * (IV_Defense % 4)) + (4 * (IV_Speed % 4)) + (8 * (IV_SpAtk % 4)) + (16 * (IV_Attack % 4)).
Type Calculation: (IV_Attack / 4) % 15 + 1.

Hidden Power Type Chart (Gen 2)

IV_Attack % 4	Type
0	Normal
1	Fighting
2	Flying
3	Poison
4	Ground
5	Rock
6	Bug
7	Ghost
8	Steel
9	Fire
10	Water
11	Grass
12	Electric
13	Psychic
14	Ice
15	Dragon

Mapping of the last bit of the Attack IV to Hidden Power Type.

Hidden Power Calculation Breakdown

IV Component	Bits Used	Formula Contribution
Attack IV	Last 2 bits (bits 0, 1)	16 * (IV_Attack % 4)
Defense IV	Last 2 bits (bits 2, 3)	4 * (IV_Defense % 4)
Speed IV	Last 2 bits (bits 4, 5)	2 * (IV_Defense % 4)
Special IV	Last 2 bits (bits 6, 7)	1 * (IV_SpAtk % 4)
Base Power	–	3

How each IV contributes to the base 70 power limit in Gen 2 Hidden Power.

Hidden Power Type Distribution Chart (Simulated)

Hidden Power is a unique and often powerful Psychic-type move in the Pokémon games that was introduced in Generation II (Gold, Silver, Crystal). Unlike most moves, its type and power are not fixed but are dynamically determined by the Individual Values (IVs) of the specific Pokémon using it. This makes Hidden Power incredibly versatile, allowing Pokémon that might not naturally have a super-effective move against a certain opponent to gain that advantage. Understanding and calculating your Pokémon’s Hidden Power is crucial for competitive battling and strategic team building in Gen 2.

What is Gen 2 Hidden Power?

In Pokémon Gold, Silver, and Crystal, Hidden Power is a special move that acts as a hidden bonus for each individual Pokémon. Its damage output and elemental type are derived from the Pokémon’s unique internal stats called Individual Values (IVs). These IVs are a set of hidden numbers (ranging from 0 to 15) that determine a Pokémon’s base stats, similar to how EVs (Effort Values) and Natures affect stats in later generations. Because IVs are set when you obtain a Pokémon (or hatch an egg) and cannot be changed in Gen 2, the Hidden Power type and power are permanent for that specific creature.

The move itself functions as a Special Attack in Generation 2. Its base power can range from 30 to 70, and its type can be any of the 15 elemental types (excluding Normal, as Normal-type Hidden Power exists but cannot be determined by the IV calculation logic in the same way). This flexibility allows players to create Pokémon with niche coverage against common threats, making it a staple in competitive play.

Who Should Use It?

Any Pokémon trainer aiming for optimal performance in Generation 2 battles should consider Hidden Power. This includes:

• Competitive Battlers: Players focused on online or link cable battles where type matchups are critical. A Pokémon with Hidden Power could surprise an opponent expecting a resistance.
• Nuzlocke Challengers: Players looking for every possible advantage to overcome difficult challenges.
• Collectors & Completionists: Trainers who want to ensure their Pokémon have the best possible move pool for all situations.
• Unique Builds: Anyone looking to experiment with non-standard type coverage on Pokémon. For example, a bulky Pokémon like Snorlax might benefit from a Fire-type Hidden Power to deal with Steel-types.

Common Misconceptions

Several myths surround Gen 2 Hidden Power:

• “Hidden Power is always Psychic-type”: This is false. While Psychic is one of the possible types, the type depends entirely on the IVs.
• “Hidden Power is always the strongest move”: While it can reach a respectable base power of 70, other Special Attacks can have higher base powers (e.g., Surf, Thunderbolt). Its strength lies in its coverage, not raw power.
• “You can change Hidden Power later”: In Gen 2, IVs are fixed for a Pokémon. Once you have a Pokémon, its Hidden Power type and power are set permanently. Breeding can produce Pokémon with different IVs and thus different Hidden Powers.
• “Hidden Power is useless if it’s resisted”: While ideally you want it to hit super-effectively, even neutral damage can be valuable if the Pokémon otherwise has no good options.

Gen 2 Hidden Power Formula and Mathematical Explanation

The calculation of Hidden Power’s type and power in Generation 2 is a fascinating bit manipulation process based on a Pokémon’s Individual Values (IVs). Each stat (Attack, Defense, Speed, Special) has 15 bits, but only the lowest 4 bits of each stat’s IV contribute to Hidden Power. These are bits 0, 1, 2, and 3.

Step-by-Step Derivation:

1. Identify Relevant IVs: You need the Attack, Defense, Speed, and Special (Special Attack + Special Defense combined in Gen 2) stats of the Pokémon at Level 100. The calculator assumes you input the final stat values, which inherently reflect the IVs.
2. Extract Lower 4 Bits: For each of the four relevant stats, isolate the lowest 4 bits of its IV. This is equivalent to calculating the IV modulo 4 for each stat. Let’s denote these as:
   • IV_Attack_Low = Attack IV % 4
   • IV_Defense_Low = Defense IV % 4
   • IV_Speed_Low = Speed IV % 4
   • IV_SpAtk_Low = Special IV % 4

   (Note: In Gen 2, the Special IV is derived from the Special Attack IV and Special Defense IV. For calculation purposes, we use the Special stat’s IV. Typically, if you know the actual Special stat at Lv 100, the calculator can infer the IV component, but for direct calculation, we need the Special IV component). The formulas used here directly map bits to the final result.

3. Calculate Power: The base power is 3. Additional power is added based on the extracted low bits:
   • Power = 3 + (2 * IV_Defense_Low) + (4 * IV_Speed_Low) + (16 * IV_Attack_Low)

   This formula reflects how the bits are weighted. The highest contribution comes from the Attack IV’s lowest bits, followed by Speed, then Defense. The Special IV’s contribution is a bit more complex in the original mechanics, often implicitly tied or simplified in calculators. A common simplified representation is:
   Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SA % 4)) + (8 * (IV_SP % 4))
   However, the most widely accepted formula for Gen 2 HP power based on direct IVs is:
   Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SP % 4)) + (8 * (IV_SA % 4))
   The calculator uses a formula directly derived from the bit manipulation logic:
   Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SpAtk % 4)) + (16 * (IV_Attack % 4)) is a common representation.
   A more precise mapping to bits is:
   Power = 3 + (bits 2,3 of Attack IV) * 1 + (bits 4,5 of Attack IV) * 2 + (bits 6,7 of Attack IV) * 4 + (bits 8,9 of Attack IV) * 8
   However, for Gen 2 HP, the specific calculation is:
   Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SpAtk % 4)) + (8 * (IV_Attack % 4))
   Let’s refine based on common calculator implementations and original mechanics:
   The calculation for Power is:
   `Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SpAtk % 4)) + (8 * (IV_Attack % 4))` — This assumes IVs are 0-15.
   The calculator simplifies this using the stat values directly, approximating IVs. A more accurate calculation based on the final stats involves calculating the implied IVs first, then applying the formula. However, for practical purposes and common calculators, the formula uses the final stat modulo 4, which is a proxy.
   Let’s use the standard formula based on the last 4 bits of each stat *as interpreted by calculators*:
   Power = 3 + (IV_D % 4) + (2 * (IV_S % 4)) + (4 * (IV_SpAtk % 4)) + (16 * (IV_Attack % 4)) is a representation of how the lowest bits are combined.
   The actual calculation often simplifies to:
   `Power = 3 + (Defense IV % 4) + 2 * (Speed IV % 4) + 4 * (Special IV % 4) + 8 * (Attack IV % 4)` — this is a simplified view.
   A better formula derived from how bits are used:
   Let `a = Attack IV`, `d = Defense IV`, `s = Speed IV`, `sp = Special IV`.
   `Type index = (a / 4) % 15` (using integer division)
   `Power = 3 + (d % 4) + (2 * (s % 4)) + (4 * (sp % 4)) + (8 * (a % 4))`
   This is the correct formula. The calculator approximates the IVs from the stats provided.

4. Determine Type: The type of Hidden Power is determined by the remainder of the Attack IV divided by 4, multiplied by 4, and then taken modulo 15. A simpler way is to consider the second and third bits (bits 1 and 2) of the Attack IV.
   The Type Index is calculated as: `Type Index = (Attack IV / 4) % 15`. This value maps to one of the 15 possible types.
   Let’s use the formula: `Type Index = floor(Attack IV / 4) % 15`. This maps directly to the type.
   The calculator uses `(Attack IV % 4)` for power calculation and `(Attack IV / 4) % 15` for type.
   The calculation for Type Index: `Type Index = (Attack IV / 4) % 15`. The result is then mapped to a type (0=Normal, 1=Fighting, … , 14=Dragon).

Variable Explanations

Variable	Meaning	Unit	Typical Range (Implied IVs)
Attack IV	Individual Value for Attack stat	0-15	0-15
Defense IV	Individual Value for Defense stat	0-15	0-15
Speed IV	Individual Value for Speed stat	0-15	0-15
Special IV	Individual Value for Special stat (combines Sp. Atk & Sp. Def in Gen 2)	0-15	0-15
Power	Base power of the Hidden Power move	30-70	–
Type	Elemental type of the Hidden Power move	Type (e.g., Fire, Water, Grass)	–

Note: In Generation 2, the calculator infers the implied IVs from the final Level 100 stats. This process isn’t perfectly exact without knowing the base stats, nature, and EVs, but it provides a strong approximation for the purpose of calculating Hidden Power.

Practical Examples (Real-World Use Cases)

Let’s look at how Hidden Power can be strategically valuable:

Example 1: Countering a Common Threat

Scenario: You have a Machamp (Fighting/Physical) that needs a way to deal with Water-types like Suicune or Vaporeon, which resist its Fighting-type STAB moves. Its Special stat is relatively high.

Inputs:

• Attack Stat (Lv. 100): 250
• Defense Stat (Lv. 100): 180
• Speed Stat (Lv. 100): 150
• Special Stat (Lv. 100): 160

Calculator Output:

• Hidden Power Result: Electric
• Power: 70
• IV Calculation: Attack IV ~ 15, Defense IV ~ 15, Speed IV ~ 15, Special IV ~ 15

Interpretation: With these stats, Machamp would have an Electric-type Hidden Power with a power of 70. This provides excellent super-effective coverage against opposing Water and Flying-types, significantly increasing Machamp’s utility.

Example 2: Surprise Coverage for a Special Attacker

Scenario: You have a Jolteon (Electric/Fast Special Attacker) and want to hit Ground-types like Golem or Rhydon super-effectively, which resist Electric.

Inputs:

• Attack Stat (Lv. 100): 130
• Defense Stat (Lv. 100): 100
• Speed Stat (Lv. 100): 380
• Special Stat (Lv. 100): 280

Calculator Output:

• Hidden Power Result: Ice
• Power: 70
• IV Calculation: Attack IV ~ 15, Defense IV ~ 15, Speed IV ~ 15, Special IV ~ 15

Interpretation: In this case, Jolteon gets an Ice-type Hidden Power with 70 power. This allows it to threaten Ground-types and Dragon-types effectively, which are common threats that Jolteon normally struggles against.

How to Use This Gen 2 Hidden Power Calculator

Our calculator simplifies the complex process of determining your Pokémon’s Hidden Power. Follow these steps:

Step-by-Step Instructions:

1. Find Your Pokémon’s Stats: Access your Pokémon’s status screen in Pokémon Gold, Silver, or Crystal. Note down the Attack, Defense, Speed, and Special stats for your Pokémon at its current level. The calculator works best if you input the stats at Level 100, as this reflects the IVs most clearly. If your Pokémon is not Level 100, the calculator will estimate the IVs assuming Level 100 stats, which is standard practice.
2. Input the Values: Enter the observed stat values (at Lv. 100 for best accuracy) into the corresponding input fields: “Attack Stat (Gen 2)”, “Defense Stat (Gen 2)”, “Speed Stat (Gen 2)”, and “Special Stat (Gen 2)”.
3. Press Calculate: Click the “Calculate” button.
4. View Results: The calculator will instantly display:
   • Hidden Power Result: The elemental type of the move.
   • Power: The base power of the move (ranging from 30 to 70).
   • IV Calculation Details: An approximation of the IVs that result in this Hidden Power.
5. Interpret the Data: Use this information to understand your Pokémon’s unique offensive capabilities. For example, if your Gengar (Ghost/Poison) gets a Fire-type Hidden Power, it can now hit Steel-types like Scyther or Steelix super-effectively.

How to Read Results:

• Type: This is the most crucial piece of information. It tells you the elemental type of the Hidden Power move your Pokémon has. Use this to plan super-effective attacks against your opponent.
• Power: This indicates the move’s strength. Higher power means more damage. Power ranges from 30 (lowest IVs) to 70 (highest IVs).
• IV Calculation: This gives you a good idea of the underlying IVs. High IVs across the board usually result in higher power (70), while specific combinations yield different types.

Decision-Making Guidance:

The calculated Hidden Power can influence your team-building and battle strategy significantly:

• Coverage: Does the Hidden Power type provide coverage against Pokémon that your current team struggles with?
• Offensive Pressure: Can this Hidden Power turn a neutral matchup into a favourable one?
• Breeding: If you’re breeding, knowing the Hidden Power of parent Pokémon can help you aim for specific types in offspring. Certain IV spreads are more likely to yield desired Hidden Power types.

Key Factors That Affect Gen 2 Hidden Power Results

While the core calculation is fixed, several factors influence the perceived usefulness and acquisition of a specific Hidden Power:

1. Individual Values (IVs): This is the absolute foundation. The specific distribution of IVs (0-15 for each stat in Gen 2) directly dictates both the type and power. Players often try to breed for specific IV spreads to achieve desired Hidden Power types.
2. Base Stats: While IVs determine HP type/power, the Pokémon’s base stats influence its overall effectiveness. A Pokémon with poor base stats might not benefit much from a powerful Hidden Power, as it may not survive long enough to use it effectively.
3. Nature (Introduced in Gen 3): Natures do not exist in Gen 2, so they do not affect IVs or Hidden Power calculations. This simplifies things compared to later generations.
4. Effort Values (EVs): EVs (known as Stat Experience in Gen 2) are gained through battling and items. While they boost stats, they don’t directly alter the *calculation* of Hidden Power type/power, which is solely IV-based. However, EVs can significantly boost the final stat number, making it harder to precisely calculate the original IVs without knowing the base stats.
5. Level: The Pokémon’s level affects its final stat values. The Hidden Power calculation relies on the IVs, which are constant regardless of level. However, to input into the calculator, you ideally want the Level 100 stats. If using lower-level stats, the effective IVs can be harder to pinpoint without knowing base stats and EVs precisely.
6. The Movepool Itself: Not all Pokémon can learn the move Hidden Power via TM. Even if a Pokémon has the IVs for a great Hidden Power type, it must have access to the move to utilize it. This limits its practical application for some species.
7. Opponent’s Pokémon: The effectiveness of a Hidden Power depends entirely on the opponent’s type. A powerful Grass HP is fantastic against Rock/Ground/Water types but useless against Fire/Ice/Bug/Flying types. Strategic use requires knowing your opponent’s weaknesses.
8. Gauge/Data: In Gen 1, the “Data” stat was used similarly. In Gen 2, the mechanic shifted entirely to IVs. Early methods of determining HP type involved using the move in battle and observing the type, or using specific stat calculation formulas.

Frequently Asked Questions (FAQ)

Q1: How do I know my Pokémon’s IVs in Gen 2?

In Gen 2, IVs are hidden. You cannot see them directly. The best way to approximate them is by using a calculator like this one, inputting the Pokémon’s stats at Level 100. For a more precise calculation, you’d also need to know the Pokémon’s Base Stats, Nature (which doesn’t exist in Gen 2), and EVs. However, for Hidden Power, the stat values at Level 100 are usually sufficient for estimation.

Q2: Can Hidden Power be Normal type in Gen 2?

No, Hidden Power cannot be Normal type in Generation 2. The calculation mechanism based on IVs produces types ranging from Fighting to Dragon, but not Normal.

Q3: What is the maximum power of Hidden Power in Gen 2?

The maximum power for Hidden Power in Generation 2 is 70. This is achieved when the relevant IVs are 15, leading to the maximum contribution from each stat’s last few bits.

Q4: Does breeding affect Hidden Power type?

Yes, breeding is the primary way to influence Hidden Power type in Gen 2. When you breed two compatible Pokémon, the offspring inherits IVs from its parents. By carefully selecting parent Pokémon with specific IVs, you can increase the chances of hatching an offspring with a desired Hidden Power type.

Q5: Is Hidden Power a Physical or Special attack in Gen 2?

In Generation 2, attacks are categorized as Physical or Special based on their type, not on a per-move basis like in later generations. Hidden Power is a Special-type move in Gen 2, regardless of its elemental type.

Q6: What if my Pokémon’s stats are low? Will Hidden Power still be useful?

It depends on the type and the opponent. Even with lower power (e.g., 30-50), a Hidden Power of a super-effective type can still be significantly more useful than a neutral STAB (Same-Type Attack Bonus) move or a weak neutral attack, especially if the Pokémon has limited other options. However, the strategic value increases dramatically with higher power.

Q7: Can I change my Pokémon’s Hidden Power after obtaining it?

No. In Generation 2, a Pokémon’s IVs are fixed upon acquisition (capture, trade, or hatching). Therefore, its Hidden Power type and power are permanent for that specific Pokémon.

Q8: How are the Special Attack and Special Defense IVs combined for the Special stat in Gen 2?

In Gen 2, the Special Attack and Special Defense stats were combined into a single “Special” stat. The IV for this Special stat is determined by the *average* of the Special Attack IV and Special Defense IV. However, for the purpose of Hidden Power calculation, it’s often simplified to use a single “Special IV” component. The calculator uses the Special stat value to infer this component.

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