Enter one of the following codes during game play to change the background to match the corresponding Game Boy case colors. You must be using a Super Game BoyHold Start GreenHold Right + Start RedHold Up + Start BlackHold Down + Start WhiteHold Left + Start Yellow
To change to the transparent Game Boy, sweep the D-pad continually in a Full-Circle until a tone is heard. Hold the D-pad in that direction and press Start.
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