Puzzle Games

Can anyone suggest some good puzzle games for the DC? The only one I have is Bust-A-Move 4 and I'm looking for some others. Simple and fun, nothing too involved.
Mr Driller is the most addictive puzzle game I have played in a long time. Also Super Puzzle Fighter II X is very good.

I played Plumb Plus ages ago but didn't think it was that good.

The only other one I can think of is The Next Tetris Online, but alas it is a failrly lacklustre version of the classic game.

I hope this helps :)

(Edited by Eleven of 9 at 9:05 am on Nov. 21, 2001)