Kingdom Hearts Re:Chain of Memories/Bosses

Guard Armor
The battle will begin in Traverse Town after Sora, Donald, and Goofy have a conversation with Cid Highwind. Cid tells them that when the bell rings three times, a large Heartless will appear and come to attack. Cid advises them to leave while they can and he leaves the three to speak among themselves. Sora believes they should stay to see the Heartless while Donald and Goofy wish to follow Cid's advice. The bell will then ring three times (whereas in Kingdom Hearts, the Sora, Donald, and Goofy were actually the ones to ring the bell) and Guard Armor will show up.
 * HP: 200
 * EXP: 48

Being the first boss you battle, the worst shouldn't be expected. Guard Armor is split into three parts all put together on arrival: the Armored Torso, the Gauntlets, and the Hammerlegs. Pick off each part and the boss will be defeated. The first part to get out of the way should be the Gauntlets, or more simply, the arms. When it still has all of its body parts, its capable of pulling off a shock wave move. If Sora travels too far off, it'll jump after him and slam down to make a shock wave. Jump up and lock on to one of the Gauntlets, which shouldn't have much HP, until its out of the way. Once you're finished with the next, all the Guard Armor should have left are its legs and its torso. You'll have to be more careful when facing off against the Hammerlegs. They'll often split apart from the torso and come stomping after you. Dodge roll until they're finished attacking and then you can attack. Once the Armored Torso is the only one left, it'll start making use of a new attack in which it twirls around rapidly and bounces after you. Dodge roll, attack, and you'll obtain your reward.

Use the Gimmick Card in battle and the each part of Guard Armor that remains will split apart and fall to the ground in a clump. Take this chance to attack away until the Guard Armor can form itself again.

Axel
When Sora, Donald, and Goofy arrive back to Castle Oblivion from their trip to Traverse Town, they are greeted by the mysterious hooded figure once again. Shortly after the reunion, another figure shows up - except they aren't donning their hood. He tells the man that he's hogging the "hero", referring to Sora, and wishes to test his skills himself. He introduces himself as Axel and calls Sora a quick learner when he answers his question with an uneasy "sure" (the question being Axel's catch phrase, "got it memorized?"). The hooded figure then leaves them to battle.
 * HP: 420
 * EXP: 75

Axel is the first boss in the game to use a Sleight, although he only has one and it's not all too powerful. He's also the very first member of Organization XIII that you fight, not counting the tutorial fight against the other Organization member in Traverse Town. All of Axel's attacks have something to do with fire. As such, he has a resistance to any fire attacks - not only that, but he's actually healed by fire attacks. This shouldn't come off as much of a problem though since you obtain the Fire magic card after you defeat Axel. One of Axel's attacks will involve him throwing his Chakram at Sora when it's engulfed in flames. This move is hard to dodge, and so are his other attacks. Another one of his attacks is a simple combo, his chakrams giving this combo some flames as well. Axel's sleight is Fire Wall. It doesn't damage Sora too much, but the con is that it's unavoidable. You can't dodge it in any way, so your only option is to take the attack and then maybe use Cure. The sleight involves Axel putting his arms out and summoning a ring of fire, which moves out all the way to the end of the arena. Another annoying thing about the boss battle with Axel is his ability to teleport. It won't be too hard for one of your attack cards to miss him completely. Still, you'll be able to attack him once he's finished with one of his attacks or when he's doing a combo on you (if you card break). The battle shouldn't be too long since his health doesn't take many attacks to reduce either. Attack, card break, and obtain your Fire reward.