Enlar get an tank from a mystery man , and he say it can help Enlar growth bigger, Enlar use it and it really work! Shelby see Enlar growth by this tank, he want try it too, but when Enlar put hose into Shelby's mouth and open the value, Shelby immediately inflate like a balloon and start floating! And now Enlar just find, this tank just for BEN10 Alien~ Poor Shelby will stay for a while like a balloon after Enlar find a way to deflate him~
Art trade with  Shelby1995_MKII He want Enlar accidentally inflating Shelby while trying to make him giant.
Enlar and shelby belong  Shelby1995_MKII