I think...
Kronk from emperors new groove would be a funny character to have... LOL
but seriously...
Roger Rabbit would have made a good summon...
Beast, from beauty and the beast?
They could have sneezy from snow white do a wind attack! hahaha
Buzzlight year with his "lazer"... lol
The three fairys from sleeping beauty maybe...

I think thats more ideas than enough... heheh... If I could only remmber all of the Disney characters...
(Thumper could pound on em... lol)