A game that depicted Ganondorf's life before
OoT, would probably rated M lol. A game with Ralph would be cool, but doesn't he only use a sword? I can't remember. If that's true, then I don't know how well his game would be. He could always use other items I guess. If such a game came out that did star Ralph, I think some Zelda fans would be saying ,"who?" Still, it's a cool idea.
If a spin-off game was made for Malon, I would have it be a horse racing game. It would feature different Zelda characters like Ilia, Link, Saria, Ganondorf, Midna, and Zelda as riders. I doubt it could compete against Mario Kart games though. Unless, maybe if you were allowed to use weapons and magic while racing. Anyway, Each character would have special abilities, and each horse would have different stats. Some characters would only ride one horse (Ganondorf would ride his black horse. Midna would ride a twilight horse). Obviously, this game would not fit any where within the timeline, and it would not be considered canon because Midna never really meets Malon, but I'm putting them together.