I'm going to propose something. Belly Drummers that can wall.These are walls that can take hits, and since they are slow, it doesn't matter. They can dish out attacks and take them. Lets actually call them BellyTanks. If you think they are utter failure, then fine. But they are ideas. Now, Hariyama doesn't work here because it is not bulky enough. The Pokemon listed below are bulky. Some even have recovering moves.
Snorlax @ Lefties
244 Hp/ 236 SpDef/ 28 Def
Careful: Thick Fat
---Belly Drum
---EQ
---Crunch
---Body Slam/Return
Now corrrect me if I'm wrong, but it won't need Atk Evs. I'm using the SleepTalk set for Lax on the Smogon Analysis. This makes it bulky to withstand most things, yet still be alive to hit back. Body Slam for PRLZ and STAB. return is stronger [if shoddy] but doesn't PRLZ. Crunch for Ghosts and Psychics. EQ for everything else except flying and Levitaters.
Heracross [Choice Band] beats it down, unfortunatly. But everything has a weakness, no?
Lucario [252 Atk] using Aura Sphere deals: 48.28% - 56.70%
Offensive
BellyLax using EQ against 4 Def Cario deals: 295.73% - 347.69%
BellyLax using Body Slam against 104 Hp Hera deals: 154.13% - 181.35%
Now, you see, it can deal with its counters well. Hera is the only Mon that will effectivly take donw Lax in one hit, Scarf or Band either way. If, they choose the wrong move however, they are dead. So, BellyLax is quite viable as long as Hera is out of the way.
So, other than speed, is this good?
Call me BellyDrum Obsessed, but I thought of making sets for other BellyDrummers. I ruled out Clefable, because it is not that good. So that left me with a few others.
BellyBro
Slowbro @ Lefties
212 HP / 252 Def / 44 Atk
Own Tempo: Bold
---Belly Drum
---Slack-off/Brick Break
---Zen Headbutt
---EQ
Ok. Not the ideal set, but it hits somewhat hard. Bro is lacking a strong Physical Water move. Slack-off, can make up for it though. i give Avalanche, because, unless you pass speed, it won't be out speeding anything anytime soon.
Hercross seems to be a threat to these tanks. Banded Megahorn OHKOs.
T-Tar [Banded, Crunch] deals: 78.39% - 92.19%
T-Tar [Dragon Danced, Life Orb, Crunch] deals: OHKO
Electivire [Expert Belt, Thunder Punch] deals: 55.73% - 65.63%
Electivire [Life Orb, Thunder Punch] deals: 60.68% - 71.35%
Offensive:
BellyBro using Zen Headbutt against 104 Hp Hera deals: 223.55% - 263.00%
BellyBro using EQ against 60 Hp T-Tar deals: 124.16% - 146.35% [DDance is PWNed even more]
BellyBro using EQ on a 6 Hp Vire deals: 227.05% - 267.12%
So, as you can see, Hera is still a threat. Brick Break also OHKOs T-Tar, but you can choose Slack-off over if you want. DDance T-Tar sets up, but get OHKOed right away. Vire gets OHKOed after trying to OHKO.
BellyKing
Slowking @ Lefties
212 HP / 44 Atk / 252 SpD
Calm: Own Tempo
---Belly Drum
---Slack-off/Brick Break
---Zen Headbutt
---EQ
The same EXACT thing as Bro, except on the SpDef side.
Everything OHKOs him, unless using a Special attack. So Lucario using Shadow Ball doesn't OHKO.
Same Calcs as Bro. Every move deals the same amount.
BellyLick [Um, ew]
Lickilicky @ Lefties
160 HP / 56 Atk / 116 Def / 176 SpD
Sassy: Own Tempo
---Belly Drum
---Brick Break
---EQ
---Return/Body Slam
MixBellyWall. Can take hits from boths sides.
Heracross OHKOs him with CC again <_<; But again focus Sash OHKOs Hera, so yeah.
Gengar [Specs, Focus Blast] deals: 86.28% - 101.50%
Metagross [Band, Meteor Mash] deals: 58.10% - 68.33%
T-Tar [Band, Stone Edge] deals: 58.35% - 68.58%
Offensive:
BellyLick using Body Slam against 104 Hp Hera deals: 94.19% - 110.70%
BellyLick using EQ against 60 Hp T-Tar deals: 147.75% - 173.88%
BellyLick unsing EQ against 252 Hp Metagross deals: 125.00% - 146.98%
Gengar is a problem here. It will knock you out. It hits back against all counters hard too. I put in Metagross and T-Tar here because the Smogon analysis says they should be fought with precautions, but thats not the fact here.
Obviously, BELLYTANKS are fairly good. Heracross hits all of them hard. Gengar utterly walls Lickilicky, so get rid of it right away.