Captain America is a BakuMarvel Bakugan. This version is very different from the other Captain America showing Steve Rogers. It's also a retool/repaint of Contestir.
Bucky Barnes assumed the role of Captain America following the assassination attempt on Steve Rogers. Dedicated to preserving the honor of his predecessor, Bucky was unwilling to wear Rogers' old costume and instead Tony Stark designed one for him. Unlike Rogers who only used his shield in battle, Bucky also used a pistol and combat knife to defeat his enemies.
It has been seen in Aquos.