NAME: Swalot
TYPE: Poison
HEIGHT: 5' 7"
WEIGHT: 176.4 lbs.
Species Name: Poison Bag Pokemon
EVOLUTION: evolves from Gulpin at level 26
Very effective:
Grass
Less effective:
Ghost
Ground
Poison
Rock
Steel, can't hit
Resistance to:
Bug
Fighting
Grass
Poison
Susceptible to:
Ground
Psychic
Abilities:
Sticky Hold Swalot's item cannot be removed
Liquid Ooze Leeching moves (Leech Seed, Dream Eater...etcs)
DW! Gluttony Swalot will held berry earlier than usual (At 50% HP rather than 25%)
Swalot...Outclassed by Muk but I prefer Swalot better

I see many other people have Swalot as a stall, and I actually use similar Stall sets over mine but I wanted to contribute

RestTalk @ Black Sludge/ Leftovers
Nature: Calm (+ Sp. Def, - Atk), Careful (+ Sp. Def, - Sp. Atk)
Ability: Liquid Ooze/ Sticky Hold
- Rest
- Sleep Talk
- Ice Beam
- Shadow Ball/ Earthquake

EVs: 252 HP/ 144 Def/ 112 Sp. Def

For this set, Black Sludge is of course more preferable over Leftovers but the basic idea is there. The natures of course will help make Swalot more bulkier as do the EV set. The ability really doesn't matter that much, in this case the DW ability won't help you since of course...you don't have a berry as a held item. You can have Liquid Ooze for the chance that you will switch into a leeching move or you can have Sticky Hold if you really want you're Black Sludge. The moveset of course has Rest and Sleep Talk which are the core. Ice Beam, well I have a lot of ice moves because I have a tendency to run into a lot of dragons. And you can choose between Shadow Ball and Earthquake either will work in this set.
That's it from me.