How do you get to Oogie boogie in Kingdom Hearts

For the three battles in this, I suggest being level 20-30. From the curly hill, examine the two little gravestones. Go through the gate that you see from the next room. You are now at Oogie Boogie's Manor. Get to the door across the bridge, and defeat all the heartless surrounding the door before examining the door to open it. I would suggest not to jump as much, or you will fall to the bottom. The bathtub will take you back up when you find it. There is a Red Trinity to the right of the room when you open the door. NOTE: This Red Trinity CANNOT Be obtained after beating Halloween Town. Make sure you get this temporary Trinity Mark. If you do mess up, SAVE at a save point. That way you can reload your game to get it. Cast Fire on the black platform, and jump on it. Go all the way up and go into the Playroom. You will find Shock, Lock and Barrel, which you will need to fight. Kill Lock first, then Barrel, because he's fast. Finally kill Shock. You may need to heal often if you have low HP, and you may also need to cast Aero if you have it(I forgot if you have it by then) to raise your defense. Once you're done, hit the lever next to Lock, I think, to open up the green door with Oogie's face on it. To find the door you may have to jump down and look around with the camera. Once you get in there will be a cutscene, and you will have to defeat Oogie. Oogie is on a ledge here, so you will need to get up to him. Lock on to Oogie. There are buttons on the ground. When they start glowing, step on the one that's facing Oogie, to trap him, he will become vulnerable to hit for a short time. Avoid the obstacles as much as you can. Repeat all this and you will defeat him. When you get back outside, Oogie will merge with his mansion. There will be shadow globs that you need to defeat around his mansion. Find a way to get up to them and destroy them. Once that's done you will complete Halloween Town and Sora will lock the keyhole. Hope this Helps!