Hmm the idea is fine...
But the model, even for a first time isnt good. It just doest look even close to a tomato, and the walk anim is buggy (one of the "leafs" or green sticks is moving into the tomato while going down.)
Make it more tomato like and it will be a funny model... try to thing up an attack for it... like a suacide splash attack or something (hinting a combined death and attack anim)