Samurai vs ninja vs fishtank

I had this pocketgame as a kid which i loved, It was called samurai vs ninja, it was cheesy but the idea of ninjas and samurai blew my mind. One day my brother and i got into a arguement and i threw a bunch of his game cartridges in a fishtank, Then in turn he threw my pocketgame in there which ruined the game. The game never worked again, but my memory remained. You owe me man...