The Comprehensive Guide
Pokémon Hidden Power Type Calculator: The Ultimate Guide to Parental IV Coverage
In the history of competitive Pokémon, few moves have had as much impact as Hidden Power. Between Generations 2 and 7, this move was the great equalizer, allowing Pokémon to bypass their natural movepool limitations. Our Pokémon Hidden Power Type Calculator is designed to help legacy players and ROM-hack enthusiasts calculate exactly which elemental type their Pokémon will use based on its hidden Individual Values (IVs).
What is Hidden Power?
Hidden Power is a Normal-type move that changes its actual element during battle. The type is not random; it is 100% deterministic, based on whether each of your Pokémon's six IVs is Odd or Even. For nearly two decades, this mechanic allowed Electric-type Pokémon to use Ice-type moves, and Grass-type Pokémon to use Fire-type moves, fundamentally shaping the competitive meta-game.
The Mathematical Foundation: Bitwise Parity
The game determines the Hidden Power type using a bitwise formula. Every stat is assigned a "Value" if his IV is odd:
- HP IV: Value 1
- Attack IV: Value 2
- Defense IV: Value 4
- Speed IV: Value 8
- Sp. Atk IV: Value 16
- Sp. Def IV: Value 32
The total sum of these values is multiplied by 15 and then divided by 63. The resulting number (0 to 15, rounded down) corresponds to one of the 16 available Types.
The Type Index Table
| Index | Type | Index | Type |
|---|---|---|---|
| 0 | Fighting | 8 | Psychic |
| 1 | Flying | 9 | Bug |
| 2 | Poison | 10 | Rock |
| 3 | Ground | 11 | Ghost |
| 4 | Rock | 12 | Dragon |
| 5 | Bug | 13 | Steel |
| 6 | Ghost | 14 | Fire |
| 7 | Steel | 15 | Water / Dark |
Note: In Generations 2-7, Hidden Power could not be Normal (the move Type itself) or Fairy (which was added after the HP formula was codified).
Optimal IV Spreads for Common Types
Because you often want your stats to be as close to 31 as possible, competitive players use "Fantastic" (30) IVs. A 30 is treated as Even by the formula but only costs you one stat point compared to a 31 (Odd).
- Hidden Power Fire: 31 / 30 / 31 / 30 / 31 / 30. (Odd/Even/Odd/Even/Odd/Even). This allows you to stay nearly maxed except for a tiny drop in Special Attack and Speed.
- Hidden Power Ice: 31 / 31 / 31 / 31 / 31 / 30. (Five Odds and one Even). This is relatively easy to breed.
- Hidden Power Ground: 31 / 31 / 31 / 30 / 30 / 31. This is vital for Electric types to hit their Ground-immune switch-ins.
The Legend of "Inner Dark"
If a Pokémon has 31 IVs in every single stat (a 6IV Pokémon), its Hidden Power Type is always Dark. This is because every bit in the formula is set to 1. In the early days of competitive breeding, having a Pokémon with "HP Dark" was a subtle brag that your Pokémon had perfect or near-perfect Individual Values across the board.
Base Power Variability (Retro Formats)
If you are using the Pokémon Hidden Power Type Calculator for Generations 2, 3, 4, or 5, you must also consider Base Power. In these games, the move's strength varied from 30 to 70. This was calculated using a similar parity formula, but it looked at the *two* least significant bits. From Generation 6 (X and Y) onwards, Game Freak simplified the move, fixing its power at a flat 60 across all types. This made it easier to use but slightly less powerful for those who had perfectly synchronized their IVs.
Why Hidden Power Was Removed
In Generation 8 (Sword and Shield), Hidden Power was removed from the game (with the exception of Unown). Game Freak's design philosophy shifted toward making Pokémon weaknesses more meaningful. Without Hidden Power, a Tapu Koko (Electric/Fairy) can no longer "cheat" an Ice-type move to defeat a Landorus-T. Players must now rely on team synergy and switching rather than a secret elemental coverage move. However, for those playing "Classic" formats on simulators like Pokémon Showdown, the math remains as relevant as ever.
Conclusion: Mastering the Element of Surprise
Hidden Power remains one of the most mechanically interesting moves in Pokémon history. Whether you are reliving the glory days of Generation 4 Sinnoh battles or breeding for a specialized coverage in an Ultra Moon project, the Pokémon Hidden Power Type Calculator ensures your elemental surprises land with maximum impact. Know your parity, check your bits, and dominate the elemental circle.