where to get a wild pokemon that knows thief in platinum

[Togepi]

where do you get a wild pokemon that knows thief in pokemon platinum?

[Zidarose]

I poked around and it does not appear there is a Pokemon you can catch with Thief already known.

However, if you manage to snag a Kecleon in the Great Marsh after you get the National Pokedex, it can learn it from the Move Rememberer in Pastoria for a Heartscale. The other Pokemon that can learn it, Mightyena, must evolve from Poocheyna and hit level 57.