He is one of the four Foodons used to make Feastivus.
Unlike the other dim sum dragons, his purpose is not necessarily to fight head on, but to combine with other Foodons to make a Deluxe (such as Dim-Sum Deluxe and Feastivus). He's the only dim sum dragon that doesn't sing everything he says, plus he can speak full english (he has the same voice as one of the Burnt Meatballs).
In The GamesEdit
Dim-Sumthin' Special is the only dim sum in the game; not even Dim-Sum Deluxe makes a appearance.