Wallace & Gromit

You get a...Gromit cup.

Wallace & Gromit are the main characters in a series of clay stop-motion animated films by Nick Park of Aardman Animations. Wallace is an eccentric inventor and Gromit is his companion and dog. Gromit appears to be a lot more intelligent than his master, and often gets Wallace out of the trouble his inventions have caused. The Brothers Chaps appear to be fans of Wallace & Gromit, but most of the references occur because of Telltale Games involvement with Strong Bad's Cool Game for Attractive People and Poker Night at the Inventory. Telltale developed Wallace & Gromit's Grand Adventures around the same time as SBCG4AP; in Wallace & Gromit's Grand Adventures, "Charlemagne the plant" is in Wallace & Gromit's living room.

[edit] Appearances

Email the chair (DVD commentary) — Matt Chapman mentions that the sweatpants button looks like "some kind of Wallace & Gromit invention" and imitates the bass intro to the Wallace & Gromit invention theme.
Homestar Ruiner — The secret shirt that Strong Bad can wear in the Snap Shak is of Nutter, the mischievous squirrel from "Wallace & Gromit's Grand Adventures".
Baddest of the Bands — The secret shirt that Strong Bad can wear in the Snap Shak is of the queen bee from "Wallace & Gromit's Grand Adventures: Episode 1: Fright of the Bumblebees".
Behind The Bad Chapter 3: The Last Straw — One of the Telltale Games employees has a Gromit mug.
Trogdor!! The Board Game Kickstarter campaign — In update #17, in a GIF showing off the improvements on the plastic miniatures, it lists the Troghammer's new grommets and "Wallace".
@StrongBadActual Tweet (6 Mar 2020) — In an unboxing video for Trogdor!! The Board Game, Strong Bad extols the Troghammer's "grommets and Wallaces".