How do you get Carrie in super paper Mario?

Answer 1

In Chapter 3-4, you go in the castle. In the room before the main hall, flip to 3D. You will see that there's a spot behind the right door. Jump over the door and go in the warp pipe. You will be in a dungeon-like room. Carrie should be somewhere at the other side.

Answer 2

When in the hallway, go in through the door on the furthest left. Go through it, (If you need to get it down use Thudley right under it) hit the block by grabbing one of the flying cat bots with Thoreau and toss it at the block. Keep going right, and through the door. Answer the questions wrong on purpose, and you will be sent to a trap room. Go right, and you should find her locked up. Press the button, and there you have it.

Or, if you already went to that one room where you had to answer it's questions and got them all right, including code, then go the room that you enter when first coming into the castle, and flip at one of the doors. There should be a secret room with a pipe in it. Take that pipe, and it will lead you to that trap room.

Answer 3

after you beat the door and get Tippi back go back into the door go over to the bush Barry was at. Then talk to him, you will then be able to have the new pixel Barry.