Akwimos

Akwimos is an amphibious like creature with webbed feet and hands. Its main Battle Gear is Gigarth.

Anime

New Vestroia 

It first apeared in episode 43 of New Vestroia all the way to the end.

Gundalian Invaders

He is Marucho's new gardian so he's going to be seen in most episodes.

Game

He was recently realeased along with Aranaout, Krakix, Lumino Drago, and Hakapoid.