Nettou World Heroes 2 Jet (Game Boy)

TEST_EN
There is a cheat to speed up the game using a cheat code entered at the title screen. Press Up, Up, Select, A, Down, Down, Select, B. The title logo will turn blue to confirm the correct code was entered. This will speed the game up using the Game Boy CPU. A few sources claim this actually uses the Super Game Boy TEST_EN command. This is not the case. However, it is possible to enable TEST_EN effectively speeding up the game. Game Genie code will load TEST_EN  from the listing upon bootup. There is also a TEST mode which is not to be confused.

Leftover Super Game Boy Functions
Nettou World Heroes 2 Jet is one of the many games that contain a completely unused set of Super Game Boy commands that are likely remnants of a Nintendo tech-demo or dev-kit given to developers to see the many available enhancements in action. Games would load commands from the listing as needed, so this list was left in for quick reference. Starting at is the full listing. The last DATA_SND commands are used and are loaded during startup.