Ok. Thanks for the help.
I now started training Emboar again. Defeated the Elite 4 and did some of the post-game events already. Wasn't really hard.
Emboar now knows Hammer Arm, Earthquake, Flare Blitz and Flamethrower. I am thinking to replace Flamethrower with either Bulk Up or Flame Charge.
Flame Charge to cover up the speed lowering effect that Hammer Arm has. Bulk Up to just bulking Emboar up, so he won't need speed at all.
EDIT: I am now thinking about learning him Thunder Punch to defeat two of his weaknesses and it won't have recoil damage like Wild Charge
Electivire, 72, Timid
Dragonite, 74, Brave
Flamethrower (will be replaced)
Excadrill, 73, Bashful
Zoroark, 73, Hasty