Hans Full is an odd match-up of several different body parts stiched together. He carries two flasks, both which have what looks like wisps inside of them.
He can clobber one of your allies by attacking them with his fists, doing 20-25 damage each time. He can also spray a toxic-like breath that steadily decreases Hp. He can also throw the flasks that he holds at you for massive fire damage. To stop this, though, all you have to do is attack the flasks until he drops them and hurls himself for high damage instead (but afterward, you have to target him, since it will become dark. If you don't, your Yo-kai will miss most of their attacks).
Finally, his Soultimate "Furious Karma Fist" is a rolling wave of fists that does great damage to your Yo-kai.
He was created by Dr. Maddiman in a secret laboratory below Nocturne Hospital.
Yo-kai Watch 2
During his lifetime, Dr. Maddiman started his research with the goal of creating the Ultimate Yo-kai Amatera in mind. Even after dying and becoming a Yo-kai himself, he continued his work.
In the present time, he finally completes it, but re-names it from Amatera to Hans Full, as it turned out very different than he had anticipated. Right around that time, the player shows up along with Whisper who, despite Dr. Maddiman's protests, releases the unstable Hans Full. Afraid of what might happen, Dr. Maddiman retreats, and the player has no choice but to battle the now out of control Hans Full.
Hans Full's name comes from "to have one's hands full".
Hans Full's japanese name comes from moteamasu (持て余す) which means "to be beyond one's control".
Hans Full's intended name Amatera (Japanese: アマテラス,Amaterasu) comes from the Shinto deity Amaterasu