Mimic

The Mimic is a Reaverbot disguised as a treasure chest. Most of them will shoot a barrage of bombs out to whoever opens it. In megaman Legends, most experienced players open any treasure box from its side or behind to avoid getting hit by bombs should the treasure box turns out to be a Mimic. In Mega Man Legends 2, the Mimic has many other actions and will even get up and walk. The Mimic can be destroyed like a reaverbot and shards can pop out of its wreckage.