Peach is a prime example of a successful spin-off.

User Rating: 9.6 | Super Princess Peach DS
You've all heard the story before; Princess rules land fairly, princess is kidnapped by giant dragon, knight comes and saves her (or, in Mario's case, a plumber). Well, now it's the "knight" who is kidnapped by the giant dragon (Bowser) and taken to a place called Vibe Island, where the Vibe Scepter is. Peach must rescue Mario from Bowser's grasp, and she does so using vibes (calm, sad, happy, and enraged) and a parasel called Perry. The opening sequence is one of the few stories that isn't related to Perry, but the parasel does have some good moments. The graphics fit the mood perfectly, but this game is a tad on the easy side. Still, don't let that discourage anyone who wants to see a knight in pink armor.