Lufia 2 is great. I don't know how easy it will be to find a cartridge though. I bought my cartridge for 70 bucks when it first came out.

It's a classic RPG. Really good and lots of fun. I like it a lot better than the first Lufia.

Forfeit Island is a lot of fun, and so is that Cave. It's a little on the easy side though, except for a few of the bosses, namely the first guy you fight in the tower with the axe and Gades.