This achievement is story relevant and can't be missed.
*** Spoiler - click to reveal ***Enter the mummy to the contest with
First get rid of the competition with
Then get the following items:
In the past get the spaghetti from the shelf in the kitchen. On the second floor read the horse Bernard's text book to make it sleep. Take the horse dentures.
Flush both items to Laverne.
Bernard is needed to get the box of laughs from Oozo the clown with
You can get if you first try the chattering teeth on the mummy. You get the chattering teeth in
Then put the spaghetti, the horse dentures and the box of laughs on the mummy.
Use the fork you get from Bernard in to shape the spaghetti hair.
Go to the right to the judges, and talk to them to get them to decide on the three categories.