High sp def, can kill with Bite :p
That's not really that viable though, considering Dig is usually a terrible move to use competitively due to the opponent being able to switch and gain an advantage (and Bite generally isn't really used on many things). You're also encouraged not to repeat mons, especially not ones used two posts back. :(
I'm aware this is a repeat but it's a different set and hasn't been used since October so it's okay!!
Heatran @ Air Balloon
Trait: Flash Fire
252 SpA / 4 SpD / 252 Spe
- Hidden Power Ice
- Earth Power
- Stealth Rock
It resists Frustration and Bite (and doesn't take much damage), can't be hurt by Dig and can just keep attacking with Earth Power which 2HKO's that Flareon. Plus it's switching into Bite according to your post which only does around 15% damage.