Rotom-H or W @ Sitrus
Ability: Levitate
EVs: 248 HP / 112 Def / 140 SpD / 8 Spe
Bold Nature
IVs: 0 Atk
- Overheat / WAWTA PUMP
- Volt Switch
- Will-O-Wisp
- Protect
Landorus-Therian (M) @ Choice Scarf
Ability: Intimidate
EVs: 12 HP / 252 Atk / 36 Def / 208 Spe
Adamant Nature
- Earthquake
- Rock Slide
- U-turn
- Superpower
There is absolutely no two-mon core thats going to be able to break that team completely, and walling most of the team isn't nearly enough to stop the win-con. The above core won't break the team, but it would definitely be a good basis for a team that creates a good matchup. We all know that one or two free turns with wrong timing, and a half-decent player with an Azumarill will undoubtedly punish you for it, and proceed to sweep your team by throwing +6 WAWTA in your face over and over again.
The key to winning against the bunny is to keep up constant pressure, and a classic method for doing this, stolen from singles, is VolTurn. These two pokemon rotate extremely well against the entire team, and as a duo, they can prevent the fm + bd turn that everyone is calling oh so broken. That said though, both pokemon are both weak to the WAWTA if you pick the hot Rotom, so if you fuck up and lose the pressure, you're a goner.
If you want a team with a genuinely good matchup however, you will still need another or more kanga checks, priority (because azu can setup on the core, but only with like 10% hp left), and some form of speed control to counteract Icy Wind + T-Wave (Semi-TR, or TW with another T-Wave immune mon).