SNES - Act Raiser - It's quite literally a mix of RTS and 2d action platforming. You build and manage your villiage while protecting it from monsters. Highly recommend!
N64 - Kirby 64 - Kirby is a game series that lets you eat enemies and gain their power. This one lets you combine powers! You can make fun combos, like rock + fire to make yourself a volcano, or electricity + bombs to make yourself into fireworks. Really fun and easygoing game! Worth playing through at least once.
PS2 - Parappa the Rapper 2 - A fun and weird game, Parappa 2 is a rhythm game where you have to repeat the raps your opponent dishes out using the face and L&R buttons. The setting and story make this game more than worth it, as you'll be saving the town against shrink rays, a mad hairstylist, and a noodle-hungry maniac. It's another fairly short game, you can beat it in two sittings if you're good. There's also a fun vs multiplayer mode.