Never ever ever ever
the most usall Pokemon to learn slude bomb are Poison type Pokemons or buy the HM or TM at a store (grimer, muk, arbok, Golbat,)
Here is a battle of typhlosion and muk. Typhlosion uses fire blast, causing damage to muk. Muk uses sludge bomb, almost killing typhlosion. Typhlosion uses dragonclaw on Muk, killing it. In this case Typhlosion wins, but gets badly hurt by muk.
Yes Muk can have the ability Black Sludge, which is similar to the Ability Leftovers. The Ability enables Muk to restore some of its health after each turn.
no the best are toxic sludge bomb gunkshot and any move for last by dgamer297 :D
Some sort of poisonous sludge.
The Sludge Bomb move was introduced in the second generation of the pokemon games (Gold, Silver & Crystal). These games were set in the Johto region. So I guess you can say the move is from the Johto region.
It can be if you teach it the right moves.
No. Only Ditto and Mew can learn transform. (I think...)
Grimer can evolve into muk starting at level 38. Grimer's evolution conditions are the same in SoulSilver as every other game so far.
Muk, I'm not so sure about, but go to this site for help http://www.psypokes.com/dex/psydex/089/attacks
It doesn't learn it by level, but it learns it only in gen 1 by tm
no, but you can do so buy breeding a ralts,kirlia or gardevoir with a grimer or muk