Effects - [s1e12] Side

: Fans often cite the "Ice-Blast" transformation as one of the most creative uses of the Omnitrix in the series, as it was the first time an alien's fundamental element was swapped.

: Ben Tennyson catches a cold, which causes his alien forms to malfunction with bizarre and often debilitating symptoms. 1. The Biological Premise: Cross-Species Pathophysiology [S1E12] Side Effects

Side Effects - Ben 10 (Classic) (Season 1, Episode 12) - ‎Apple TV : Fans often cite the "Ice-Blast" transformation as

: The concept of "alien illnesses" returns in later series (like Ben 10: Ultimate Alien ), but S1E12 remains the definitive example of the trope. [S1E12] Side Effects