Axl

Axl (アクセル) is one playable character from the Mega Man X series, and having an important role in both games he's appeared in so far. 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, since the game mentioned Model A's true identity as Model Albert, it is only safe to assume that the Biometal was made as a tribute to the character by Capcom since it would be impossible for the events of X7 and X8 to take place since Zero was sealed away right after the sixth game, only to awaken later in the Elf Wars.