Haxorus for previous generations were it had access to the move Dual chop (Generations 8 and before)
Haxorus @ Focus Sash
Ability: Mold Breaker
EVs: 252 Atk / 252 Spe / 4 HP or 4 Def
Adamant / Jolly Nature
- Dual Chop
- Close Combat / Superpower
- Earthquake
- Dragon Dance
Description: The focus sash is used for situations were your opponent managed to buff his stats, and reach a point were it can beat anything with one hit, so Haxorus will endure the hit and will be able to attack and in many situations beat his opponent in one hit or at least weaken him enought for your next pokémon if it has a priority move, also focus sash on this situation can give Haxorus an opening to use dragon dance in situations were his opponent will not have the speed needed to attack him on the next turn and doesn't have a priority move.
Dual chop is used in this setup instead of outrage, dragon claw and so on for one specific reason, it is meant to deal with opponent that uses focus sash, so he can defeat anything without much resistance. Like situations were you used dragon dance, can beat anything that will come next, but your opponent endured the hit with focus sash, you will have this move to deal with this situations. On generations were it has acces to scale shot, this move is still preferable because the odds of it causing more damage than the odds scale shot causing more damage is higher, and in pokémon games we don't have control over everything, so we need to manage the odds. Also, the odds of causing more damage is important here because this move is a multifunctional move, is not only meant to deal with focus sash users, but also to cause high damage using a dragon type move against other dragon types.
Close combat should be used on games were it has acces to it, however if it doesn't have acces to it, super power will work well too, the point is having a move of a different type to have good matchups to enemies of different types, using the appropriated move to cause the higher amount of damage possible. Same goes for earthquake. For super power, is better used on situations were the trade off of his downsides are worty.
Dragon dance should be used when you have an oppening to increase Haxorus speed and damage, facilitating his job. (If used on the right situation Haxorus can probably became unstopable)