Lord Loss: Some random demon guy. One of the stronger members of the bunch.
Proffessor Membrane: Scientist dude who uses brains over brawn. Quite dumb in reality, though. Only he knows how this is possible.
Tails Doll: Freaky murderer nut who likes to lick his lips and get into arguments with Lord Loss.
Reflux the Knaaren: Guy who controls all the Knaaren's. He weilds a staff and Mario even wasn't able to beat him.
Bartholomew Kuma: Bear cyborg guy who has massive cases of explosive diarrhea all the time. Incredibly strong, even for the SheeBookie.
Hisa Takei: Student congress president of an unknown school. Extremely confident and confided in joining the SheeBookie because her friend Mako became a vice-admiral.
Squilliam Fancyson - The newest member of the SheeBookie. It is unknown how he earned the position as of yet.
Bowser: Shot off into space and never returned, so they kicked him out. (That's a LIE!)