The game mainly uses Series 6000 and Warner Bros. sound effects, as well as selections from the Series 1000 and Universal Studios libraries. One sound effect from the Lucasfilm Sound Effects Library can also be heard in-game.

Beta

NOTE: These sounds were only used in the game's beta, and were not used in the final game. Mario's voice clips in the beta are various male and female voice samples taken from the Voice Spectral Volume 1 library, with the exception of the burning/falling scream being a recording of Mel Blanc's voice from the Warner Bros. Sound Effects Library. The general consensus is that they were placeholder sounds for Mario, before Charles Martinet's recorded his own voice clips.