Who do you use for HM Slaves?

[Bolt the Cat]

Acreus or if someone had a Mew. they can learn every HM.

They can only learn 4/8 HMs each, though.

[Gothitelle K]

They can only learn 4/8 HMs each, though.

Yeah but a Pokemon who can fly and one that can surf is a must. So I don' need an HM slave for those.

[Arlo]

It depends on the game, though I've got a Bibarel in all of them. In Diamond, Bibarel's got Cut, Rock Smash, Strength and Rock Climb, Empoleon has Surf, I've got a Gyarados with Waterfall, and I put Fly and Defog on a Chatot. In Pearl, Bibarel has the same four, and I put Surf, Fly and Defog on a Pelipper and Waterfall on a Floatzel. And in Platinum, Bibarel has Surf, Strength, Waterfall and Rock Climb and I've got a Tropius with Fly, Defog, Cut and Rock Smash.

[Jabu]

I use Golem for heavy lifting.

[Dragontail]

Bibarel is my main slave. I use a variety for everything else.

[Lightning Raider]

Usually Bibarel or Marril.

[*~Silver*~]

For me it's almost always Togetic and Gyarados. I don't even know why Gyarados it's generally a good battler... I guess there are just better Pokemon for the spot. xD

[WastingLight]

If I ever use one it is always Bibarel

[EonDragonFTW]

my bidoofus

[Cometstarlight]

In FR/LG I usually use a Paras for a while

[Expelliarmus]

I personally use Bibarel as a HM slave since it can do all sorts of wonders on the field, such as move boulders, smash rocks, surf across waters, rock climb, waterfall up or cut, it can pretty much use any HM except Fly which is amazing. Personally I use it but sometimes I also use a Graveler :3.

[Popboi]

Bibarel and Swanna.

[Rakansen]

I always used Pelipper and Bidoof.

[silverangel]

I use a Scyther for Rock Smash and Cut, since Technician boosts them to good power.

[InsaneDragoniteHD]

I use Bidoof because it is like the best HM slave in Platinum.
Other games I use Pokemon like : Rattata or Pidgey.

[★ Lucario ★]

Bibarel of course :P
I used Onix and Tropius once too.

[Gothic-Gothorita]

My Staraptor is like my eternal Fly Pokemon, I use it on Pearl, Platinum, and Black. It's name is Mateus. It's also flawless! =D Which is good for me! XD
If I ever need a flying Pokemon, the first I think is "Mateus".

[ansem the wise]

my rayquaza, i use him for fly, surf, strength, and............(i'm drawing a blank for the last one XD)

[Sealotic]

Geodude for Rock smash, Rock Climb, Strengh...
Cut, Fly and all the other... Well, I'm not really organized, I just deal with all those stupid HM...

[Jazz Hands]

Bibarel Ovbiously!