Mimic

The Mimic (ミミック) is a Reaverbot disguised as a treasure chest. Most of them will shoot a barrage of bombs out to whoever opens it. The Mimic can be destroyed like a Reaverbot and Refractor shards can pop out of its wreckage.

Mega Man Legends
In the original Mega Man Legends, a treasure box can be opened from its side or from behind to avoid getting hit by bombs should the treasure box turns out to be a Mimic.

Mega Man Legends 2
In Mega Man Legends 2, chests can only be opened from the front, but the Mimic has a delay before releasing bombs. There are also two additional varieties. One variety is a Mimic that will get up and walk when an enemy gets close or opens the Mimic chest. The other variety exists only in the Saul Kada Ruins, where it first shoots out Zenny before shooting bombs.

Similar enemies

 * Mimicron