Good two player co-op games?

Hi ,

  I was planning on buying Pikmin 2 and Prince of Persia: The Two Thrones and I was wandering are thee two player co-op also can you recommend some good co-op Gamecube games. thanks

pikmin 2 is coop, pop:ttt isn't

if you like action rpgs or are into comic books, xmen legends (1&2) are both fun (w/ up to 4 player coop).

straight up action, lotr: return of the king is also a good choice

fps, timesplitters 2, timesplitters future perfect are also great (reminiscent of goldeneye and quirky)