This berry is red, it looks like a cherry. "It is look like" is not correct in any situation because this sentence is not correct. Always use "it looks like".

Its look is like- has no incorrect language unless you say It's. Yet, ever though it is correct, we will not say that. It is more direct and too common to hear- it looks like. Jon looks like James Dean. It looks like it will rain. The raisin looks extra small - or - the raisin looks like it is extra small

It looks like

You would never say "It's look like". You would say "It looks like".

The sentence should read: This berry is red. It looks like a cherry.