Remember those little Tamagotchi keychains from the '90s? This is basically that, but on the Game Boy—so now you can take your weird little digital pet everywhere without worrying about it dying in your backpack. The Game Boy version actually adds some fun mini-games to play with your pet, which is way better than just watching it eat and poop. Plus, you can save multiple pets on one cartridge, so if you get bored of one, you can start fresh without resetting everything.

It’s still the same weirdly addictive cycle of feeding, cleaning up after, and occasionally scolding your pixelated buddy—just with a few extra ways to kill time while it naps. The nostalgia hits hard with this one.