Where art thou, the Grass Type being the Worse Type thread is being subjected to noobs! It's fun if you read there posts since they have little competitive knowledge unlike you that day that explained Grass effectively!
Oh, I though you could change the nickname.. too bad I simply didn't try it. but there should be a bad word filter in the traders and he could see the name when he traded it + he traded a jirachi (a bad one but still) for a shiny lucario.. he could at least save it to trade it back..
"Anyway it's your fault for trading a legendary event pokemon in the first place for a shiny pokemon and FACEPALM about the relase you could change his nickname"
Uh, no he couldn't. You cannot rename traded Pokemon. I found this out when I traded over a Loudred from Pokemon Soul Silver to Platinum (Who was simply unnamed) and the Name-Rater in Platinum would not let me change the name.