Ferroseed

“When threatened, it attacks by shooting a barrage of spikes, which gives it a chance to escape by rolling away.”

— Pokémon Black

“They stick their spikes into cave walls and absorb the minerals they find in the rock.”

— Pokémon White

“It absorbs the iron it finds in the rock while clinging to the ceiling. It shoots spikes when in danger.”

— Pokémon Black 2