Raise a Zubat into a Golbat, then get the Golbat to really like you. Then, level it up. It's easier if you have a Zubat, because by the time it's a Golbat, it may already like you a bit.
Migrate it.
He has a weavile, gyarados, honchkrow, and a crobat in Diamond and Pearl. In the Distortion World, he has a weavile, houndoom, gyarados, crobat and a honchkrow, not necessarily in that order.
there are 150 kinds of Pokemon that you can see and/or obtain. Unless you have friend trade you Pokemon that you can only get in pearl to you, you'll never obtain them all. In Pokemon diamond and pearl all you have to do is see the Pokemon and you get its data unlike the older versions where you have to obtain them.
darkrai and arcus
Milktank is located in route 209 and 210 in both Diamond and Pearl.
GOLBATI think you can get a golbat or crobat to learn mean look in Pokemon diamond/pearl. you can get golbat almost everywhere.
No, you do not need diamond and pearl to obtain all the Pokemon in the national pokedex. You either need to have a friend who has all the older Pokemon, or you could transfer the Pokemon yourself from older games.
IT IS NOT IN POKEMON DIAMOND OR PEARL BECAUSE IT IS ONE OF THE STARTING POKEMON IN LEAFGREEN!!!!! Migrate one from firered or leafgreen.
Bonsly is located in the trophy garden in Diamond and Pearl as well as routes 209 and 210 for Pearl.
You must MIGRATE!!!!!!!!!!!!!!!!!!!!!!
You go to Fuego Ironworks.
He's in the Great Marsh