mega dude- I hear ya man! Vincent is god!
rpg master- Like I said in my last post, these are RUMORS. No one's going to take them seriously!
I went back onto Wikipedia and it said and I quote:
'The world of The Little Mermaid, Atlantica, appears in all three games of the Kingdom Hearts series, where Ariel teams up with Sora, Donald and Goofy to fight Ursula thrice. '
Okay, here's what I believe is where you got confused. Atlantica DOES appear in all three games, because it's true. You just didn't count one particular game, Chain of Memories! Though the third game to Kingdom Hearts is called Kingdom Hearts 2, KH2 is really a third game. Wikipedia meant that Atlantica was in KH1, KHCoM, and KH2. See? All three games!