User blog comment:Coolot1/The Hand Craft Hour Returns/@comment-3004323-20200913225218/@comment-24839525-20200913225706

Game Over:

Character: The Hacker (voiced by Danny Pudi) - a person from "the real world" who hacked into the game world, causing people to act weird.

Episode: You've Been Hacked! - The game over gang has to worry about a hacker who is messing with all of space and time.

Jane:

Character: Principal Cthulhu (voiced by Tony Todd) - the principal of the school who is threatening from the outside but is actually very nice and bakes.

Episode: The Principal's Office - Garry and Jane both get sent to the principal's office after Garry forced Jane to buy him drugs as they learn that the principal isn't what everyone believed him to be.

Space:

Character: COMET (voiced by Tara Strong) - an extremely friendly AI who is disguised as Stella's phone as she came with her on Earth.

Episode. Cometnapped - Someone has stolen COMET as Stella and Ted have to race to find COMET before the thief learns she is an alien AI.