Pokémon Gold Version, Silver Version, and Crystal Version - Evolution
Some Pokémon can evolve:
- At the end of any battle (except battles the player lost) in which the Pokémon levels up or after a Rare Candy is used on it and takes effect;
- When a certain item is used on it; or
- When the Pokémon is traded to another game.
Those are the three basic ways that Pokémon can evolve. Here is a more detailed list.
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Case 1 (The Pokémon levels up). The evolution can be canceled by
pressing B while the Pokémon evolves.
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The Pokémon is at or above a certain level (most Pokémon)
- And Attack is greater than Defense (Hitmonlee), or Attack is less than Defense (Hitmonchan), or Attack is equal to Defense (Hitmontop).
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The Pokémon’s friendship is 220 or more (example: Chansey)
- And it’s day (Espeon), or night (Umbreon). Here, day is from 4:00 a.m. through 5:59 p.m., and night is from 6:00 p.m. through 3:59 a.m.
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The Pokémon is at or above a certain level (most Pokémon)
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Case 2 (The Pokémon is traded). The evolution can’t be canceled.
- The Pokémon is traded to another game (example: Machoke).
- The Pokémon is traded to another game while holding a certain item (example: Scizor). If the Pokémon evolves this way, that item is removed from it.
- Case 3 (A certain item is used on the Pokémon). An example is Pikachu. The evolution can’t be canceled.
Special notes:
- Day-Care: A Pokémon placed in the Day-Care won’t evolve, even if it gains enough Exp. Points for its level to go up.
- Everstone: A Pokémon holding Everstone won’t evolve, even if it evolves using an item and the player uses that item on it.
- Double Evolution: A Pokémon gets only one opportunity to evolve when it levels up, even if it meets one or more conditions to evolve. For example, if a Zubat with a very high friendship reaches level 22, it evolves into Golbat, but not into Crobat afterward. It must wait until the next time it levels up to evolve into Crobat.
- Name Change: If a Pokémon whose nickname is the same as its old species’s name in a game in a certain language evolves in that game, or is traded to another game and evolves in that game, then the Pokémon’s name changes to the name of the new species in the language of the game where the Pokémon evolves. (Pokémon names are in upper-case letters in games before Pokémon Black Version and Pokémon White Version, so upper-case letters are distinct from lower-case letters. Mr. Mime is called MR.MIME -- with no space.) No other case can make a Pokémon’s name change upon evolution.