Both the end credits cryptography and Mabel hallucinating that she is on a mutant dolphin say "Onwards, Aoshima!", a reference to the executive producer, John Aoshima.
The USA:NEWZ May 2, 1995 headline reads "CHEESE CRUST PIZZA DECLARED "DELICIOUS" ". On March 26, 1995 the Pizza Hut franchise introduced the first stuffed crust pizza to its menu. It was wildly successful and within months most pizza places had stuffed crust.
First appearance of Robbie V.
This episode marks the beginning of Dipper's crush on Wendy.
The teens and Mabel and Dipper actually stayed in the convenience store from Dusk till Dawn