I'm sure this had been answered somewhere, but i'm too lazy to dig it up xD;

If you breed a coloured dratini, or a RWB Mareep for example, with a ditto, will the egg be coloured or just a normal one. Same question goes to if a coloured dratini + a normal one, or will that have a 50/50 chance of being coloured?

I'm fairly certain it will be a normal egg in both cases. I do not believe alternate coloring transefers in this RPG. Joan may have to give a more official answer, though.