Read his powerset at Marvel Wiki and tell me no way after that. IB is a low level IG.Also either master can empower him further to maintain the balance in their universe, so if Zom is disruptive to that balance, Zom will be going one way or another. If IB can alter reality on a Cosmic Scale then he can handle Zoms destruction.
Ib does not stand a chance!!!!! He isnt even close to being on the same level as Zom. King Thor defeated IB!!! Inbetweener very rarely shows up at a powerlevel on par or greater than Galactus. Zom is a far greater threat than Galactus.