From Bulbapedia, the community-driven Pokémon encyclopedia.

A Stage 2 Pokémon (Japanese: 2進化(しんか)ポケモン 2nd Evolution Pokémon) is a type of evolution card in the Pokémon Trading Card Game. Stage 2 Pokémon evolve from Stage 1 Pokémon.

A Stage 2 Pokémon can be placed in play if the corresponding Stage 1 Pokémon is Active or Benched. Certain effects can circumvent this, such as the Rare Candy Item card, that allows a Basic Pokémon to evolve into a Stage 2 Pokémon. All attached cards and damage on the Stage 1 are put onto the Stage 2, but all Special Conditions and other effects are lifted. The Stage 2 Pokémon can only use its Stage 2 attacks, unless the card says otherwise.

Pokémon such as Venusaur, Reuniclus and Omastar are Stage 2 Pokémon.

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