The demo for Viewtiful Joe 2 on the PS2 Holiday 2004 Demo Disc contained a glitch that would erase the player's memory card.
In early trailers, a multiplayer mode was shown off. One player would play as Joe while the other player would play as Silvia. However, sometime during development, the mode was dropped.
All of the level names are parodies of the names of certain movies and books: "Ten-Million Years B.C." = One Million Years B.C. (1966) "Viewtiful Heroes and The Statue of Doom" = Indiana Jones and the Temple of Doom (1984) "Memoir of an Invincible Monster" = Memoirs of an Invisible Man (1992) "Thunderboy Lives Twice" = You Only Live Twice (1967) "Ice Edge" = Ice Age (2002) "Do Androids Dream of Romantic Scene?" = Philip K. Dick's book "Do Androids Dream of Electric Sheep?" "Starship Viewties" = Starship Troopers (1997)