If you think about it, it doesn't work if the idea was to make it look legit. The name should be メロエッタ
and the OT and ID should be えいがかん 07142 and the description should be "Pokémon Event. Apparently had a fateful encounter at Lv. 15" and it should be holding a PP max. Also make sure it has a Wishing Ribbon. So there are a lot of things you should modify. There is no set nature. Not a thing you should be too concerned about but if you can somehow manage to make it modest or timid I think it might be beter.