Watching Sora willingly jump off the plank of Captain Hook's ship because he believed he'd be able to fly was heartwarming enough. Moments later we get to see his faith rewarded as he soars away before the crocodile can eat him.
Watching Sora and Donald happily reunite thanks to Tarzan, sure it's quickly spoiled by a CMOF, but it's a sign of things to come.
Jasmine has been captured, and Aladdin only has one wish. Genie tells him that he can just use that wish to get Jasmine back, safe and sound. He chooses to free Genie instead.
The conclusion to Sora's last visit to the Hundred Acre Wood has him, Pooh, and all their friends looking up at the big, beautiful moon together on a hill, before Sora waves goodbye, and the cover of the book changes to a drawing of Sora holding Pooh's hand as they walk side-by-side.
"Sora, don't forget. We shall always be here. If you'd like to visit again, that is."
Kairi bringing Sora back from the darkness and transforming him from a heartless back into his normal state by hugging him.
Sora: Kairi... thank you. Kairi: Sora!
Not to mention Donald and Goofy's happy reaction upon seeing Sora turned back to normal.
The cutscene of Sora summoning Bambi, complete with the teen giving the fawn a pat in the head. Twice as adorable in Halloween Town, because of Sora's vampire garb, whichshowsa lot.
Goofy defects from Riku's side. The first thing he does after saving Sora's life? Ask Donald to apologise to Mickey for the fact that he is disobeying his orders.
Donald declares they can do it together and defects himself.
Sure, looking back, we know that Mickey would definitely agree with them, but they don't know that: Mickey is their friend, but also their King - he could chop off their heads if they defy him. And they still do it.