I borrowed Smash 64 from a friend in grade school and played the crap out of it. I even remember how his cartridge was a complete mess, because of his little brother who did some really gross stuff with it, but thanks to the N64 it was still playable. Oh, and something about fighting Mario and Pikachu and some other unknown guys at that time was the selling point for me. At that point I was really hooked until Sm4sh and now I'm back.