Kingdom Hearts: Chain of Memories/Sora/Halloween Town

When Sora, Donald, and Goofy arrive at Halloween Town, they come across Jack Skellington He explains Halloween Town's Heartless problem to them, and Sora, Donald, and Goofy decide to help. After the conversation, you'll learn Terror and get the Key of Beginnings. After battling all of the Heartless in this room, hit the door with the Keyblade and synthesize with a Black Room card. If you don't have one, go through the door like you normally would. After battling all of the Heartless in this room, hit the door to the right. You can use a Moogle Synthesis card if you have one, or just battle all of the Heartless and hit the door to the right again. After getting rid of all the Heartless in this room, strike the door and head to the fifth room. After killing all the Heartless here, go back to Room 2. Get to the top door and get into the sixth room. Kill all the Heartless and strike the top door again, this time synthesizing with any of your normal cards with a value of 5 or up. Head through Room 7 to Room 8 and then back to Room 6. Get to the door to the left and use a card with a value of 3, a card with a value of 4, and the Key of Beginnings. A cutscene will follow where the three meet Dr. Finkelstein. After the conversation, you'll get the Key of Guidance and be able to move on.

Go back to Room 8 and strike the door. To get through, use a card with a value of 6, a card with a value of 7, and the Key of Guidance. Here you'll find Sally. After some conversation, Oogie Boogie will steal the potion and run away with it. Naturally, you have to get the potion back. Run after him by going back to Room 5 and striking the door at the bottom. After synthesizing an Attack Card with a value of 3 or less, adding up green cards to sum up to the value of 30, and the Key of Truth, you'll be set to fight Oogie Boogie in the next room.

Oogie Boogie
Oogie Boogie is all about dodging and Card Breaking. From where you start, a gate will be in between you and Oogie Boogie. Since you don't have the option to attack him, you'll have to card break the dice he throws down. Once that's done, the gate will lower and Oogie Boogie will throw more dice down. Keep repeating the same process and eventually the gate will lower completely. Attack Oogie Boogie with your best cards until the gate comes back up and your way is blocked once again. You'll have to card break more dice before you can begin to attack him again. Oogie Boogie isn't too tough a boss, his attacks including: Additionally, Oogie Boogie can heal himself, sometimes making it time-consuming to actually defeat him. Once you do, however, you'll get a cutscene and then you'll be able to leave Halloween Town.
 * A rotating saw blade goes around the arena. Dodge this the best you can with a dodge roll.
 * Another blade attack where two blades are being smashed all over the arena. Once again, use the dodge roll to your advantage.
 * Oogie Boogie brings random Heartless into the arena to attack Sora, Donald, and Goofy. Fight them like you would any other Heartless.