User blog comment:SniperAssassinX/Ask away: Main characters/@comment-5883671-20140115024705/@comment-5128269-20140115025139

Dillon: well, as a guy who hates injustice and seeing people doing things against their will, it's simple, besides, anything to get under Eggy's skin too XD

in other words: he does it because really he feels it's the right thing to do, and of course to make sure Eggman's schemes go out in smoke and such, as he'd put it: "someone's gotta play the hero"

thank you for asking :D