By the time of Mario + Rabbids Kingdom Battle, some of them are actively heroic. Starting with the second game, you play as them, and while they still cause a lot of mayhem, it's more due to stupidity and insanity than any true evil intentions. In the first game, they were actively cruel and malevolent, kidnapping and mistreating Rayman and Globox's children. Took a Level in Kindness: Noticeably less antagonistic ever since their status as Breakout Characters was established.
Fortunately for them, come Origins and Legends, the two series have finally split apart.
Always Chaotic Evil: In the original game, the entire species are insane and malicious creatures who live for chaos, with no real exceptions to the rule.They got so popular that they completely took the focus away from Rayman for a good while, until Rabbids Go Home and Rayman Origins came along.
They seem, and are, stupid as hell, but they are actually surprisingly organized, enough to capture Rayman and force him to play games in an arena. A group of cute, but crazy rabbits who are known for their ear-piercingly loud scream.