The ones taken are Cunning Plan, DTK and Katnip.
Id suggest...
Rip (the mini Ripper)
Kitty (the mini Pussycat)
Kat Rip 3 (the Pussycat rambot)
Stiff Breeze (mini Storm II)
Just some ideas if you dont know any.

Also Kody you arent actually the defending champion here, as Mina won the Easter Bunny Tribute Championships 2008, not a predecessor to Robot SMASH!!. Mina IV looks awesome though