I don't have any fighting games for GC, besides the Naruto games, so I don't have any arcade sticks for it. This is the only one I know of:
http://store.videogamecentral.com/ps2acc9568.html
I tend to not like the arcade sticks that are shaped like Xs. I like the square arcade sticks.
As for PS2, the decent arcade sticks are going to cost some money. The Tekken 5 arcade sticks that come with the special edition of Tekken 5 are still decent prices on Amazon:
http://www.amazon.com/gp/offer-listing/ ... 667&sr=8-4
I have 3 of these. Got them on clearance from an EB for $19.99 a piece.
The Street Fighter Anniversary Edition Arcade Stick for (PS2 & Xbox) are decent too, but I've heard their lives are not too long.
They are charging a crap load for them too:
http://www.amazon.com/gp/offer-listing/ ... 797&sr=8-1
I have 1 of these and that's it.