Crash Advance IV is a pirate game for the Game Boy Advance. It is based off of an engine used in many Sintax games (Rayman IV, Spider-Man, Digimon Adventure, etc.), and as such, it has the same bugs/glitches that the others do.
The game sometimes does not work on original hardware due to problems with its protection. It is notable for having been described on the Crash Mania forums in 2006, 9 years before any footage or other information was available for it, in a way that became a running joke on that forum.[1]