Does anyone have any idea where all the cooking disk are?

Cooking Disk R - Enter the third floor of Flipside via the Warp Pipe on the second floor. By using Tippi to uncover a path of invisible Blocks leading upwards, the player will be led to a chest with the Cooking Disk.

Cooking Disk W - Located on the third floor of Flopside, this Cooking Disk's location is the mirror equivalent of Cooking Disk R, and can be reached using the same method.

Cooking Disk Y - Inside Harold and Gertrude's house on the first floor of Flopside. Mario must flip into 3D to reach this Cooking Disk, which is lying on the table.

Cooking Disk B - Enter The Overthere in Flopside, and flip into 3D as Mario to discover two chests. One of the chests contains the Cooking Disk (the other contains the Golden Card).

Cooking Disk G - In the first area of Downtown of Crag, head to the east wall where the Save Block is, and flip into 3D as Mario. Use Dottie to shrink Mario, and enter the hole in the wall. Go down the pipe on the other side of the hole, which leads to a flooded room. Enter the other pipe in this room to reach a Whacka, then flip into 3D to reach the chest containing the Cooking Disk.

Cooking Disk PU - In The Overthere, there is a Warp Pipe behind the easternmost column in Sector 2. Use Mario to flip into 3D, and to reveal a pipe behind the column. Go down the pipe and defeat the Gigabite to make a chest containing the Cooking Disk appear.