Ok First off Before I Begin the Story I've been Thinking of Cool Non Ben 10 Creatures for Rocky 10. I'm only Limiting it to 3 Aliens In this Story. Here's my Suggestions. I'll pick the ones with the most 3 Votes.

Sans: Undertale

Ironhide: Transformers (GMC Topkick Alt mode)

Rouge the Bat: Sonic

Xenomorph: Aliens

Ash: Final Space

Fox: Final Space

Little Cato: Final Space

And Garchomp: Pokemon

Those are my Suggestions For those who are Interested Vote for the Aliens please.

Oh and 1 more thing NO, I'M NOT DOING ANY OF THE DRAGON BALL NONSENSE! (No Offense to the Fans It's just I'm not much of a Fan)