Plot hole: We see flashbacks to the first game in the context of Sora's memories. However, we hear Jafar speaking about how Sora found one of the keyholes. This was said during a meeting with the Disney villains at Hollow Bastion, long before Sora arrived there, so this scene shouldn't be included at all.
Continuity mistake: When Kairi and Sora finally meet again, Kairi hugs Sora. In the first shot, Kairi's arms are over Sora's. However, in the next shot, her arms are under his.
Trivia: In 'The World That Never Was' you come across a type of graveyard with the headstones acting as gateways to each of Organization XIII's members' rooms. Each headstone describes their respective member with a depiction of their respective weapons.
Question: In the "switches" mission in Agrabah (when you're flying on the magic carpet) what should we do to trigger them?
Answer: Lock onto them and look at their color. If they all turn blue cast blizzard. If they all turn red cast fire. If they all turn yellow cast thunder.