Probably not.
you cant you have to pick it from prof birches choices
The privately owned company MyEdu is headquartered in Austin Texas. The company formerly known as Pick-a-Prof officially changed it's name in the summer of 2009.
defeat the Pokemon league and then talk to prof Rowan and he should give you a poke radar. Then go to the patch of grass outside canalave city and use it. If there is a sparkly patch of grass go to it and you should find ditto.
once you get a pokeradar (obtained after you fill in your pokedex by seeing all the Pokemon and then go to prof Rowan) go to the west of route 211 and use it in the grass. its hard to find though.
There are many places where one can find more information about PROF. One can find information about PROF at popular on the web sources such as Stophouse Music Group and Last FM.
yes you can find a DITTO in pearl, i have oneyou will need to be on the national pokédex, then prof. rowan will give you a pokéradar in his lab at sandgem town. take this and use it outside canalave city, on the patch of grass by the blonde haired man. the grass that moves, go to it. it may be a ditto. they are kind of rare.
in his house
First you need to beat the Elite 4 and get the national pokedex. Then you can get the poke'radar (Prof. Rowan's lab, given to you Prof. Oak). Then go to route 205 use the poke'radar in patches of grass to try and find it note: it's rare and therefore hard to find. source: http://bulbapedia.bulbagarden.net/wiki/Hoppip_(Pok%C3%A9mon)
you find him in eternea city near the bike road in a small house.
After getting the national pokedex, prof. oak will be at eterna city telling you that he spotted a moltres within sinnoh. It will be roaming around sinnoh just like latios in hoenn. It will be level 60.
Route 210-North. You must use the PokeRadar.Note: You can only get the PokeRadar after you have completed the Sinnoh Pokedex and talk to Prof. Rowan.you can find a bagon east of celestic town by using the pokeradar in the tall grass.:)IT may take hours...
For the shinno pokedex, it is given to you from Prof. Rowan in Sandgem town at his lab. For the national pokedex, it is given to you from Prof. Rowan and Prof. Oak in Prof. Rowan's lab after completeing the Sinnoh pokedex.