50 Cartoon Crushes: Thunderblast ("Transformers: Cybertron", 2005) (Patreon)

Crush Class: A/I (Adult with much Internet help)

AKA 'Chromia' in the Japanese incarnation of the series, a Decepticon boat-babe whose primary life goal is to be a groupie for the biggest, most powerful baddie she can find, and hopefully marry 'em. Pretty much the antithesis of a positive female role model for a children's cartoon.

- and the underboob is visual canon in the anime, if not the toy she is based on. Thanks, Japan!