Mine has to be Dragon Quest: Rocket Slime, a DS spin off of the Dragon Quest series that sees you playing as a slime operating a tank and rescuing the people from your town. You run around the overworld, collecting items to use as ammunition and saving money to upgrade your tank. The art and music are just as great as you’d expect from the Dragon Quest series. It made fantastic use of the DS’s dual screens. It’s also written for a younger audience, so a lot of it is just really silly and fun! Try it out for sure, I’m so sad there’s no sequel :(
I really enjoyed Space Station Silicon Valley for the N64. It turns out there was a bug in the original game so you could never complete it 100%. A couple years ago, I purchased an Everdrive (https://krikzz.com/our-products/cartridges/ed64x7.html) so I could patch the ROM and play on original hardware. Pair this with some new wireless controllers and it’s the perfect experience.