Professor Dumbledore v.s. Professor Crumbs 

I apologize if I sound ignorant, but who is Professor Crumbs?

EDIT: Sorry, I don't watch much Disney Channel. Dumbledore is FAR better! He's gone through such more and he is much more powerful and understanding. Proff. C is like a joke. He seems incapable of doing anything. Alex and Justin saved Wiz-Tech, not him who had full responsibility of the school. He didn't even aid them or give useful information!