Kamek skip

After entering Kamek's room, immediately leave.
Toss the babies and bring them to the very lower-left corner of the room.
Jump with Baby Mario and press up so that he lands on the spring. Mario should be on the very bottom edge of the spring. DON'T keep holding up.
Walk right and just as Baby Mario falls off the spring press left. You should clip inside.
Now jump with Baby Luigi and hold left until you get to the wall. It should look like Luigi is on top of Mario.
Switch to the adults and spin jump upwards into the loading zone. While they're in the air, press X. Kamek's room and the cloud room should both load.
Switch to the babies and enter the hole on the left.
Now that you're out of bounds, hold right for 5 seconds, down for 3 seconds, then left for less than a second and then right. You should enter the loading zone after Kamek.