You can't.You rarely get to 'get' them.For a matter of a fact,you cant get ANYTHING in pokemon ranger.All you do is calm pokemon down and have them help you.The first muk and grimer you will ever 'get' is in the waterworks.If you havent gotten to the point to where you need to fix the waterworks,i suggest you keep playing.In the waterworks,water types and drowzee will help ALOT for muk.I suggest keeping this in mind.
You capture it in the waterworks. When you get to the end of the waterworks mission you will find a Muk at the entrance. First you should capture the 2 grimers that are with it. the quickly circle in between its attacks.
How to capture it:
I highly suggest catching a Drowzee or Croconaw, because Croconaw's bubbles can paralyze them. Otherwise catch Grimer with your partner Pokemon, do it when they are VERY far away from Muk and are huddled together (I believe it does not last long on Muk) If you caught a Drowzee USE IT. Otherwise like I suggested use a water Poke Assist, those paralyze your foe from moving or using attacks (and Muk has a horrible slime trail!)
In the old, burnt-down mansion on Cinnibar Island.
You actually have to catch a Grimer first, which are located at Route 212 and then evolve it to a Muk at level 38.
In the Cave when you see Grimer take 3 pictures of him then quickly throw a pester ball and watch as he evolves
1.Somewhere near the Bicycle Route there is a BUNCH of Grimier inside a patch of grass...but there is a rare muk in there. I found it accedently on my 3rd try.
2.Evolve Grimier
In Volcano Cave.
Pokemon mansion.
Its a bit of an oxymoron, but you simply hack Pokemon and make them appear not to be hacked.
You have to make friends in-game for them to show up on the Pokemon Global Link. Register there friend codes and they will appear on the PGL.
Repels make WEAK not strong Pokemon not appear
You have to have a GBA Pokemon game in the GBA slot. Note that this only works if you play it on a regular DS. It won't work with a DSi or 3DS.
no unless you didn't save action replay or new game
Its a bit of an oxymoron, but you simply hack Pokemon and make them appear not to be hacked.
Switching Pokemon doesn't work. Simply use a potion, or snap into the mic. If done right, your Pokemon will either attack and not hurt itself, or snap out.
You have to make friends in-game for them to show up on the Pokemon Global Link. Register there friend codes and they will appear on the PGL.
Wait a couple of game hours until the tree starts shaking check it with A to make a Pokemon appear.
It appears to be a random mechanism, that is attracting any Pokemon after 12 real-time hours. You cannot alter the game time to make them appear.
You need to transfer all 3 of the regis from you ruby,sapphire, or Emeralds game packs
Repels make WEAK not strong Pokemon not appear
Only Nintendo,Game freak and everyone else who make Pokemon can make legal Pokemon games
You have to have a GBA Pokemon game in the GBA slot. Note that this only works if you play it on a regular DS. It won't work with a DSi or 3DS.
Stage 2: Tunnel Diglett: It digs up right next to the pikachu... be ready to take the pic, because he disappears once you take it, then pop up quickly nearby. Dugtrio: If you can get one picture of Diglett each of the first three times he pops up, a Dugtrio will appear for the fourth and fifth appearance (which is three Digletts together).
no unless you didn't save action replay or new game
you meet them