I made this for another purpose, but it'll do. :D

Bonus points for detail.

Those are metroids. Is it the friendly metroid from the end of... Super Metroid?
I think I've remembered that all wrong.

No fucking way. Toonstruck was the first thing that had come to my mind but I totally didn't remember any bowling scene. It's apparently one of them cases where the subconscious is surprisingly powerful. O_O

The things one remembers can often be very strangely selective. If you are interested here are two bowling scenes taken from the same longplay.
Scene 1, Scene 2

Yep.

Nope.

Try again. :D

Metroid Prime? That's the only one I remember to have multicolored metroids.

You are correct - they're fission metroids, which have the same colours as Samus's beam weapons.

Boh. I never played it.

This one took a lot longer than I first imagined, so I cropped half of it to make it harder than obvious :p

/edit: Here's a hint picture. It's probably pretty obvious now, maybe. At least it's less obvious than with the arthropod I cropped out of the first image. The one I totally didn't crop out just because the proportions were wrong and I couldn't be bothered to fix 'em, laalaalaa
/edit2: Here's a picture of the aforementioned arthropod. Something stupid happened a moment ago, and it was one of those things you shouldn't complain about online, because that'd be silly, so I channeled some of my current frustration and whatnot into him. It actually helped. People are big zebra faces and have smelly feet!
/edit3: now I'm just drawing because I'm bored

Is that Ryu from Street Fighter? Or Goku from some dragonball game? or both?

It isn't Ryu or Goku. Street Fighter's kinda warm, though. Anyway, no correct answer yet :p

Mortal Kombat

Mortal Kombat is correct! Your turn.

The only thing I can think is Home Alone, but that doesn't quite work. More the pose than anything.

Actually, now that I think about it, he is probably covering his ears, and has no mouth.... I still got nothing.