How do you breed mr mime to get mime jr in Pokemon pearl?

2 Mr mimes or a Mr mime and a ditto

Mime Jr. can only be obtained in the Trophy Garden south of Hearthome City, talk to mr backlot inside the mansion every day and he will tell you what rare Pokemon is in his garden that day,

Go to hearthome through the left and there should be an entrance to the south. Keep going down until you get to the entrance to the Pokemon mansion and go talk to mr backlot. Then go to the trophy...

give mr mime an odd incense and breed it with ditto in day-care

obtain the odd incense and then breed mr.mime but it all on bulbapedia really XD