Axl

Axl (アクセル) is one playable character from the Mega Man X series. He has a very special ability called Copy Shot, which allows him to disguise himself as certain non-boss enemies. In Mega Man X: Command Mission, Axl's Hyper Mode allows him to turn into defeated bosses such as Wild Jango, Silver Horn, Mad Nautilus, Mach Jentra, Incentas, Depth Dragoon, Rafflesian and Ninetails.

In Mega Man ZX Advent, a Biometal called Model A appears as the only usable Biometal in the game, possessing similar appearance, weapons and shapeshifting abilities. However, coupled with Axl being a non-canon character (See Mega Man Zero timeline and Model A's true identity as Albert, it is only safe to assume that the Biometal was made as a tribute to the character by Capcom.