Ray-Thunder is an action-packed game for the Nintendo Game Boy. Specific details regarding the gameplay are unknown without further information.  However, the title suggests that the game would likely involve some form of action, possibly shooting or combat, featuring lightning or thunder as a key element. The visual style would adhere to the technical limitations of the Game Boy, using simple pixel art.  The game's developer and publisher would likely be a Japanese company given its release in Japan.

Ray-Thunder (Japan)

Ranma 1-2 - Kakugeki Mondou!! (Japan)