Looking through the hex, I can see that the ROM header is "Digi World" so maybe this is based off another pirate called Digimon World or something? (given that it's an RPG, I very much doubt that it's based off the Playstation game)
I also found some error messages which I guess appear when you crash the game or something. One of them, which is seperated from the rest, says "Unknown Signal." No idea what that one's about. Another one says "This code can only be run on a Thumb compatible processor" which I don't understand either. Some of them also appear at least twice in the ROM.