I've noticed everyone on GTS wants an event Pokemon like Victini, Jirachi, Celebi, etc. for Diancie, but GTS won't let me trade my Celebi. I'm looking for a Diancie, any level or gender is fine. My Celebi is level 11 and knows Recover, Heal Bell, Safeguard, and Psychic with a Bashful nature. I'm willing to level it up or teach it any moves you want. If you're interested then message me :-)
