Outside References
In the movie, several references are made to outside works:
-When Joey refers to himself as the "Godfather of Games" in front of a crowd seeking to Duel Yugi, he vocally imitates famous actor Marlon Brando (an obvious reference to Brando's role as Vito Corleone in The Godfather.) Joey later quotes Brando a second time by repeating his famous line "I could've been a contender," after he and Tristan are literally run over by the crowd as it runs after Yugi hoping to duel him. Marlon Brando first said the line in the 1954 film On the Waterfront.
-After defeating Pegasus in a Duel, Kaiba utters the signature sign-off line "That's all folks," used by Porky Pig in every incarnation of the Looney Toons series of cartoons. The line was a jab at Pegasus using a Deck of Toon cards.
Read more about this topic: Yu-Gi-Oh! The Movie: Pyramid Of Light