• Ruby and Sapphire

 > A hold item that raises the critical- hit rate.

 • Emerald

 > A hold item that improves the critical-hit rate.

 • FireRed and LeafGreen

 > An item to be held by a POKéMON. A lens that boosts the critical-hit ratio of the holding POKéMON.

 • Generation IV

 > An item to be held by a Pokémon. It is a lens that boosts the holder’s critical-hit ratio.

 • Generation V

 > An item to be held by a Pokémon. It is a lens that boosts the holder’s critical-hit ratio.

 • X and Y

 > An item to be held by a Pokémon. It’s a lens for scoping out weak points. It boosts the holder’s critical-hit ratio.

 • Generation VII

 > An item to be held by a Pokémon. It’s a lens for scoping out weak points. It boosts the holder’s critical-hit ratio.