Ah, I totally forgot about the rules, thank you! It's been over a decade since I played Emerald, and I unfortunately lost all of save data at some point, so I wanted to give myself this one mythical as a sort of consolation for everything I lost, and stick one of each memory ribbons on it to symbolize my accomplishments in those worlds as well. I guess I could just give myself one more mon, but I already don't like cheating personally. I'm only giving myself this mew because I had one before, I can get another one now from SP, and I always especially wanted that unobtainable faraway island one...
Oh well, I'll figure it out. Thanks for the resources!
Btw, I had a small side question. So the Mew is totally legal, but only without a met location. When I mark it as faraway island, it says invalid met location, expected Poké transfer. I'm editing in Alpha Sapphire. Is this normal for that Mew, or have I given myself the wrong one?