Wonderland

There will be a short cut-scene with the White Rabbit when you arrive. Once you regain control follow him to the next area. Here, push the bed first then talk to the door knob. He'll tell you to drink the potion on the table to get smaller, so drink it and proceed to the Queen's Castle. You'll see another cut-scene where Alice is on trial for allegedly trying to steal the queen's heart. Sora then claims that Alice is innocent, so the queen will ask you to gather evidence and prove it.

When you regain control, go through the left entrance to the Lotus Forest. After the short dialogue with the Cheshire Cat, go north then east past the second red flower. You'll find a Blue Trinity mark and the Footprints evidence here. Next jump on the mushrooms, then across the trees/platforms to find a high exit to the Bizarre Room. Get in there to find the Stench evidence. Make your way back to the Lotus Forest after that. From the entrance go north and jump on the boulder, then onto the platform for the Antenna evidence. Jump on the mushroom that leads north for a chest with a Thunder-G, then onto the mushrooms leading east up the trees for a chest with Puppies 16-18.

To get the fourth evidence you first need to find the yellow flower. If you examine it it will ask for a Potion. Once you give it the potion, it will make you (not Donald and Goofy) big. Then if you turn around you will see a stump. Go and jump on it and it will shrink into the ground and a green leaf stand thingy will pop up next to it. Then look for the fruit piece that you may have seen earlier on top of the tree and cut it down to eat it to become small again. The when you are small again, go north then your first east turn. Jump onto the small mushrooms then the left stand thingies and head south. That extra platform should allow you to now get to the platform in the corner. From this platform you should be able to go to the Bizarre Room. Then off to the right you will see the fourth box with the Claw Marks evidence on the ledge. Go back to the Queen's Castle now.

Save your game first then talk to a heart card soldier to present the evidence. The queen refuses to check each evidence and instead asks you to pick one. This one's completely random, so you'll just have to take chances and hope you get the right one. Regardless of what you picked, the queen will order her card soldiers to seize you. Your target here is not the soldiers but their tower. Just knock the cards that are closest to you out, so that they won't bother you while you destroy their tower.

After the battle, everyone will notice that Alice is gone. There's nothing else to do here so go back to the Lotus Forest. Inside, you'll see the Cheshire Cat again. When you regain control, give the yellow flower a Potion to grow big and move the boulder. This will make a few platforms appear. Move around until you see a "?" then take the fruit and eat it to get small again. Jump on the new platforms to get to the other side. You'll find another Blue Trinity mark and an exit to Queen's Castle.

Take it for a chest with an Aero-G. Go back to the forest and proceed to the Tea Party Garden. Be sure to sit on the chairs here for some presents. Go to the inverted Bizzare Room after that. Inside there will be another short dialogue with the cat. Just jump onto the tables and light the two lamps. Also, remember to release the lock up north to reveal another exit to the Queen's Castle. Go through there to gain access to a chest containing Puppies 13-15.

Head to the normal Bizzare Room. Save your game first. Once there, prepare for a boss battle.

Boss Battle - Trickmaster

This battle isn't as tough as it looks. Simply hit him with magic when he is standing and use physical attacks once he bends down. He'll try to slap you away with his arms most of the time, so just keep your distance when he does that. He will start shooting flames after a while. Watch out for that too.

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After the battle, there'll be a cut-scene in which the door knob complains about having been awakened by all the "ruckus", then you'll get the Navi-G Piece. You'll also receive the Blizzard magic from the Cheshire Cat (if you did not get all four evidence pieces)