You go to route 204. It's REALLY hard to find...
How Do You Get Lotad In Pokemon Platinum?
You get it in route 204 south of eterna city
Route 204 but only a 8% chance though
You can get a ludicolo though the GTS and put in day care with a ditto and see if an egg comes I don't know if it works or not but I'm going to try it
