PID registered as RM instead of RMC

[Maritoguionyo]

when using ID RMC instead of RMCE/J/P/K on a game it will be shorten to RM on the database instead of RMC like the other PIDs

I was wondering if other games usually have a longer ID in the database or are all 3 characters so instead of removing a single characters, just pull the first 3 characters rather than removing one to probably make a pull request