How Do You Get A Mothim On Pokemon Indigo Online?

You can't unless you have cheats, or trade for one. I know this because I caught 20 or more burmy but all of them turned into wormadam. Same case with leafeon, you can't find it without cheats, you have to trade for 1. I attached a leafstone to my eevee and leveled it up but it doesnt work. :-( I am on pokemon indigo online my username is BeckybooMad. My rarest pokemon is shiny latias lv72 but will soon be lv100. Will trade it for a mew or jirachi or manaphy or shaymin.