lessee...scumbug appeared in the episode night of the rogues, chromedome appeared in the ep planet of the turtleoids part 2, muckman and joe eyeball appeared in the ep muckman messes up (i love that ep =O] ) and the triceratops appeared in the ep night of the dark turtle!
that's all i can remember...but don't worry, hopefully someone else can answer your other questions and give you more detailed info about em as well
