How nice to actually recommend a Game Boy game again!
Kid Icarus: Of Myths and Monsters
W- This game manages to outdo its predecessor in a lot of ways. Pit controls much smoother, bottomless pits are out of the picture, the difficulty is more balanced (but it’s still hard!), the environments are a little more dynamic, and it overall eludes a greater sense of enjoyment. This is a solidly made action game that fixes many of Kid Icarus’ issues, and is definitely worth considering.