I loved the Puzzle League games. n_n; I still play the N64 game fairly regularly with my brother. It's interesting each time we play over the years because I used to beat him SO badly when we were younger and he'd gradually last longer and longer against me--now we're pretty much even.
As for the GBC game, orz, I could never beat intense mode. >< I think I got up to Whitney and I know that file is sitting at her (or whoever I'm stuck at) with 99 continues, lmaooo.