Who Were the Original Aliens in Ben 10?

All of Ben Tennyson's original alien transformations were cool, but some were much more useful than others, like Heatblast and Upgrade.
All of Ben Tennyson's original alien transformations were cool, but some were much more useful than others, like Stinkfly and Wildmutt.
Ben Tennyson finds an alien device that allows him to transform into ten beings in Ben 10.

Ben 10: Omnitrix Aliens (Alien Force) / Characters - TV Tropes

all alien ben 10 (OS). part 1 by amirben10art on DeviantArt

Which of Ben's aliens are stronger, the original ten aliens from the original series or the Ten aliens from Alien Force minus Alien X and replace him with Rath? - Quora

Top 10 Favourite Ben 10 Aliens

Ben 10 Original Aliens Tier List (Community Rankings) - TierMaker

Meet the Aliens!, Ben 10

Ben 10 Original Series All Aliens!(2006)

Eye Guy Ben10Hero

Which of Ben's aliens are stronger, the original ten aliens from the original series or the Ten aliens from Alien Force minus Alien X and replace him with Rath? - Quora