Zettai Muteki Raijin-Oh English translation
絶対無敵ライジンオー · Zettai Muteki Raijin-Oh
PentarouZero's English translation of the Game Boy Raijin-Oh game, a tough robot-versus-monster action game.
What's translated
PentarouZero's patch translates the game's text into English, including the menu that matters most: the one behind the Select button, where you swap weapons, change the robot's body between its forms and combine them into the bigger robot.
The game
Each stage is a duel between your robot and a monster, with one button to attack and one for your weapon. Enemies shrug off plain hits, so the trick is to use that Select menu to switch forms and weapons until something works. It is known for being hard.
Playing it
The patch is applied to your own copy of the Japanese Game Boy game, following the instructions in its readme. The patch's database page linked here has the details.