Yes, I am indeed aware that this is not an actual tier in metagames (if it is, please say so).
How it works
Slowking and/or Slowbro are always sent out first. One of them uses Trick Room.
When Azumarill uses Belly Drum, Slowbro would Psych Up it.
Floatzel is used to prevent Drought/Solarbeam techniques from working, as well as some support if Trick Room fails. That's why it has an Eject Button.
Note that everything except Floatzel has minimum Speed IVs.
Quagsire (M) @ Rocky Helmet
Ability: Unaware
EVs: 128 HP / 126 Atk / 128 Def / 128 SDef
Relaxed Nature
IVs: 0 Spd
- Waterfall
- Amnesia
- Recover
- Curse
Slowking (M) @ Lum Berry
Ability: Oblivious
EVs: 4 HP / 252 SAtk / 252 SDef
Quiet Nature
IVs: 0 Spd
- Trick Room
- Ice Beam
- Heal Pulse
- Scald
Azumarill (F) @ Sitrus Berry
Ability: Huge Power
EVs: 252 HP / 252 Atk / 4 SDef
Brave Nature
IVs: 0 Spd
- Waterfall
- Brick Break
- Play Rough
- Belly Drum
Slowbro (M) @ Mago Berry
Ability: Regenerator
EVs: 4 HP / 252 Atk / 252 Def
Brave Nature
IVs: 0 Spd
- Trick Room
- Zen Headbutt
- Brick Break
- Psych Up
Octillery (M) @ Assault Vest
Ability: Moody
EVs: 128 HP / 252 SAtk / 128 SDef
Quiet Nature
IVs: 0 Spd
- Water Spout
- Flamethrower
- Energy Ball
- Ice Beam
Floatzel (F) @ Eject Button
Ability: Swift Swim
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Waterfall
- Crunch
- Ice Fang
- Rain Dance