Psychobos first appears as a cameo in an alternate dimension Incarcecon. A different alternate dimension counterpart appears, as he brings an army of Way Bads through a wormhole at Niagra Falls.
Psychobos is mentioned by Kevin in Destiny Islands, where he explains he was the arms dealer of choice back in the day. He makes his modern day appearance assisting the Incursean Empire, which he assisted in the past. He is in charge of powering their Conquest Ray. When running out of Amber Ogia, he recruits the Black Hawks and works primarily with them.
Psychobos first appears under the employment of Vilgax, being responsible for repairing Vilgax. However, he has alterior motives, planning to get the Omnitrix for himself. He betrays Vilgax and allows him to be thrown in the Null Void. He is arrested, and is threatened to be exposed to Vilgax if he didn't assist.
With Khyber's help, he manages to escape the Null Void, planning on finishing the Nemetrix. They succeed, and use it against Ryder. Ryder manages to fight back and force them to retreat.
In Dimension 30, Psychobos takes on the role of Looney Tunes' Porky Pig, his stutter matching. Psychobos has problems saying simpler words, but no problem with longer words when speaking.
