The Fantastic Adventures of Dizzy

Evil Dizzy sprite
This sprite is always present in PPU, in both Blue and Red renditions of the game. Purpose unknown.

Smiley Test
All known NES games from Codemasters (Bee 52, Big Nose Freaks Out, Big Nose the Caveman, Dizzy The Adventurer, Fire Hawk, Linus Spacehead's Cosmic Crusade, Micro Machines, MiG 29: Soviet Fighter, Quattro Adventure, Quattro Arcade, Quattro Sports, Stunt Kids and Ultimate Stuntman) are based on the same stub library. As a result, all of these games, including game collection versions, include a "smiley test" of PRG ROM integrity and CHR RAM consistency.

To trigger the PRG test, hold Up + Down + Left + Right + A + Select + Start and press Reset. To trigger the CHR test, hold Up + Down + Left + Right + B + Select + Start and press Reset. If the PRG checksum matches with the internal value or the CHR RAM chip has no bad cells, the program will display a green smiling pixel face; otherwise, it will display a red crying pixel face.