Using a super rod in the pond in Celadon City you have a 1% chance of catching a Grimer.
Ok this might be a little hard for you, as it was for me ;). Okay so whenever you reach the bosses, there is a green slime thing and when you step on it, the boss of that green thing will appear (like Grimer or Muk). To complete it, you must find the final green slime thing and catch Muk. (Sorry it's been so long since i played that mission!)
In Pokemon Leaf Green, you can catch Pokemon in the grass, water, or in a cave.
lugia isn't in Pokemon leaf green
Get Leaf Green, or just catch a growlithe because Arcinine is by far the superior Pokemon.
You have to see them
Trade It From Pokemon Fire Red Or Leaf Green
trade it from leaf green
you have to trade with leaf green
you can not catch scyther in Pokemon ruby,emerald or sapphire . you have to trade them from Pokemon fire red or leaf green.
Nope you have to catch it on Leaf Green and trade
You can't catch Charmander in Pokemon Diamond. You have to import it from Leaf Green or Fire Red.
u cant catch shellder in Pokemon leaf green u trade it from Pokemon fire red and ya HAPPY PLAYING!!:)