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Well, I'd imagine the first one came out in some capacity, as there's a second one listed for the GBA on EB's site.
http://ebgames.com/ebx/product/236682.asp
Edit - And here's the GBA version of the first game listed on GameStop's site - ]http://www.gamestop.com/product.asp?product%5Fid=160459
And here's a backordered pre-owned PSX version - http://www.gamestop.com/product.asp?product%5Fid=934608
And here's IGN's review of the first one on the GBA - http://gameboy.ign.com/articles/463/463169p1.html
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The newest Nintendo Power has a guide for some of the second game, and info on the third one coming to the GBA.