Enter one of the following codes at the diner to unlock the corresponding selection in the "Extra Option" menu in the diner:
 
Option Code
Invincibility 4PR28U
Big Blasters IG72X4
Classic Blasters L449HD
Silly Blasters NR37W1
Brushes SHRUB1
Tea cups PUCEAT
Minikit detector LD116B
Moustaches RP924W
Purple YD77GC
Silhouettes MS999Q