Yes you can. It is only available in the Firey Path. But they are rare (Only a 2% chance you will run into one.)
no you have to migrate it from either Sapphire or ruby version hope i helped
By evolving Grimer
No, they are there so you can catch them :)
Go to Route 212.
you can catch grimer in celadon city by either fishing or surfing. it says so on Serebii.net
You can catch him in fiery path in Pokemon ruby.
You can catch grimer in the one fire cave that leads to lavaridge town.
It is, and you can catch at Fiery Path. It's one of the more common Pokemon you can encounter there.
no you have to migrate it from either Sapphire or ruby version hope i helped
grimer is in route 212
It is grimer
fire cave
By evolving Grimer
LV:38
by killing someone
No, they are there so you can catch them :)
Go to Route 212.