• Ruby and Sapphire

 > A wondrous stone & a hold item that prevents evolution.

 • Emerald

 > A wondrous hold item that prevents evolution.

 • FireRed and LeafGreen

 > An item to be held by a POKéMON. The holding POKéMON is prevented from evolving.

 • Generation IV

 > An item to be held by a Pokémon. The Pokémon holding this peculiar stone is prevented from evolving.

 • Black and White

 > An item to be held by a Pokémon. The Pokémon holding this peculiar stone is prevented from evolving.

 • Black 2 and White 2

 > An item to be held by a Pokémon. The Pokémon holding this peculiar stone is prevented from evolving.

 • X and Y

 > An item to be held by a Pokémon. A Pokémon holding this peculiar stone is prevented from evolving.

 • Generation VII

 > An item to be held by a Pokémon. A Pokémon holding this peculiar stone is prevented from evolving.