DJ Boy is an early generation Mega Drive game that was ported from a relatively obscure coin-op.
I did some codes for the Japanese version, please keep in mind that they are not compatible with US or EU versions.
DJ Boy (Japan) Codes
Begin game with double amount of energy
Begin game with double energy units
Round 1 & 2 Boss starts on one energy bar (Also works on round 5 Boss rush)
Round 3 Boss starts on five energy bars (Also works on round 5 Boss rush)
Round 4 Boss starts on one energy bar (Also works on round 5 Boss rush)
Round 5 end Boss starts on one energy bar
Round 6 Boss starts on one energy bar
Round 1 & 2 Boss defeated on arrival (Also works on Round 5 Boss rush)
Round 5 end Boss defeated on arrival
Round 6 Boss defeated on arrival
Bosses never show up! * except final
* You must disable this code before Round 6 starts or else the game can’t end.