When Tarzan pulls a Dynamic Entry and catches Sabor just as she's about to sink her teeth into an unsuspecting Sora.
The Beast's entire presence was a huge Moment of Awesome. With your party members temporarily leaving and you stuck without your weapon, the Beast is truly a lifesaver. Which only adds to the fact that he was only there to help in the first place because he ripped his way through the dimensions through sheer force of will.
Sora's speech, just before getting his Keyblade back from Riku, was pretty awesome. He knows that the guy could kill him with a single hit of this baby, but he keeps standing there, saying something along the lines of: "I know now I don't need the Keyblade. I've got a better weapon. My heart." Probably, the Keyblade thinks the same as him, since that speech actually "persuades" it to ditch Riku and return to Sora.
Although it's possibly the worst scene in all of Hollow Bastion, but Sora stabbing himself with the Dark Keyblade to get Kairi's heart back was awesome.
And he gives Donald and Goofy a reassuring grin. He stabs himself in the chest and his biggest concern is his buddies worrying.
The moments before Sora's speech, Goofy and Donald who had been ordered by King Mickey to follow the Key Bearer, which was Riku at that time, wholeheartedly turned against Riku to protect Sora. The high point of the moment is when Riku throws a Dark Firaga against an unarmed Sora, and Goofy immediately jumps in from of him, blocking the fire with his shield.
Goofy's shield, by the way, is barely the size of Riku's fireball.
The Goofster's lines net him some bonus points.
Goofy: Sora ain't gonna go anywhere! Riku: You'd betray your king? Goofy: Not on your life! But I'm not gonna betray Sora, either, 'cause he's become one of my best buddies after all we've been through together.
To make that even more awesome — the Dark Firaga is half way across the room before Goofy moves to stop it. Talk about quick on his feet! We can see why he got the job as Captain of the Royal Knights. He's quick.
"There's no way you're taking Kairi's heart!"
Both fights with Riku are, in fact, awesome. In the first fight, you get Donald, Goofy, and the Keyblade back after having to fight without them, not to mention that you get to pay Riku back for how he's been acting this entire adventure. The second fight occurs after a major plot twist, and now Riku -sorry, Ansem- has got a Keyblade of his own. Cue epic Duel Boss set to one of the best tracks in the entire game.
Donald gets one before the second fight. After Riku steals a piece of Sora's heart and proceed to finish him off, Donald, the Squishy Wizard of the trio, charges for Riku to protect Sora! He gets sent flying as expected, but you have to give Donalds credit to making sure his friend was not going to be harmed.
Jack Skellington certainly qualifies. Most other worlds live in fear from the Heartless. When they start to appear in Halloween Town, Jack tries to find a way to control them to use them in his Halloween celebration! Some people run and hide from the Heartless - Jack wants to dance with them!
And when he got the message that the Heartless are in an alliance with his death enemy Oogie Boogie, he proceeded to rip them apart with his bare, boney hands alone.
Technically, he, along with most of Halloween Town's residents, are not "living" and don't have the literal heart that the Heartless are looking for. The only people in the town who were under any threat by them were Lock, Shock, and Barrel, and they don't look exactly human either. The Heartless probably thought that Jack was one of them and went along with his antics for fun. Which makes him even more awesome for controlling Heartless by entertaining them.
It should also be noted, once Sora locks Halloweentown's keyhole, the Heartless do not go back to the Town Square. The Final Fantasy crew couldn't keep them out of two levels of Traverse Town, and King Triton can't keep them out of downtown Atlantica; but Jack either rustles up a town militia or does it himself.
The David and Goliath-style battle against Oogie's Manor. Oogie Boogie has merged with his lair, becoming a seven-storey high monster guarded by Heartless. Sora is just a five-foot tall boy with a Keyblade. Admit it; Sora climbing the manor and destroying all the orbs while blindfolded in one eye is nothing short of pure awesome.
Sora is gone, leaving Kairi, Donald, and Goofy alone. In strolls Ansem, ready to tie up loose ends. What's Donald and Goofy's reaction, you ask?
The Final Battle with the World of Chaos IS one. Even moreso if you use each of your summons to help deal the damage. Ansem, Seeker of Darkness should have learned not to mess with Dumbo, Bambi, Tinker Bell, Simba, Mushu, and Genie.
Special props to the development team who made the HD Re Mix of the first game. Because the original assets were lost years ago they had to build the game up from the very beginning on new hardware... and they made it better!