Atareeter

Atareeter (アタリーター) is an enemy from Mega Man X3. It appears in Neon Tiger's stage. It crunches the floor and creates small spikes where it passes. The spikes it creates are not fatal as long as X has some energy left.

Other Media
Atareeters appear in the Rockman X3 manga alongside other Maverick minions catching X during his fight with Crush Crawfish.