Inside The Nintendo Gamecube codes
When you defeat Merlin and unlock the codes in the pause menu, you can go inside the Nintendo Gamecube through these places:
Prince's Castle: Go inside the window and try to get back, but miss.
Creepy Crpyt: Go on the church, then press [R] and [L] a lot to the north.
Mother Goose Land: Go to the farm and press [R] and [L] to any direction.
Molasses Sewers: Go to where Frankendrop is located. Go up to the bell then go right. Hump and press [L] hard and [R] light repeatedly to go in the inside the Gamecube.