Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 208 SpA / 52 Spe
Timid Nature
IVs: 0 Atk
- Sunny Day
- Magma Storm
- Solar Beam
- Earth Power
The team struggles against Char X and Banded Azu. Rather than use a reliable check or counter, I thought it'd be interesting to see how Magma Storm + Sunny Day + Solar Beam Heatran would fare. Leftovers gives off the impression that you're SpDef Heatran, and lures in bulky waters like Rotom-W, Slowbro, and CB Azu, and can trap them via Magma Storm and fire off a Solar Beam in the Sun. Earth Power allows you to beat non-EQ Char X that try to set up on you. EVs allow you to outspeed 218 Rotom-W and some Defensive Landorus sets, which Keldeo and Lucario appreicate damage on.
Calcs vs Azu:
208 SpA Heatran Magma Storm vs. 88 HP / 0 SpD Azumarill: 96-113 (26.4 - 31.1%) -- guaranteed 4HKO
208 SpA Heatran Solar Beam vs. 88 HP / 0 SpD Azumarill: 306-360 (84.2 - 99.1%) -- guaranteed 2HKO
252+ Atk Choice Band Huge Power Azumarill Waterfall vs. 248 HP / 0 Def Heatran in Sun: 224-266 (58.1 - 69%) -- guaranteed 2HKO after Leftovers recovery
AV Azu fails to 2HKO Heatran in the Sun with Waterfall, meaning that you beat it 1v1.