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.

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

Original Playlist, Ben 10 Fan Fiction Wiki

Ben 10's Original Aliens, Ranked Worst To Best

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

Ben 10 Reboot - First 10 Aliens Banners by dlee1293847 on DeviantArt

Pixilart - ben 10 original aliens by garrett5

Why doesn't Ben use his original 10 aliens in Omniverse at all? - Quora

Ben's Arsenal, 5 Years later Wiki

Meet the Aliens!, Ben 10

Top 10 Favourite Ben 10 Aliens

Ben Tennyson - Wikipedia