Justified: Being hit by a Dark-type move boosts the Attack stat of the Pokémon, for justice.

PokémonTypesAbilitiesHPAtkDefSpASpDSpeBST
Cobalion SteelFighting 91 90 129 90 72 108 580
Terrakion RockFighting 91 129 90 72 90 108 580
Virizion GrassFighting 91 90 72 90 129 108 580
Keldeo WaterFighting 91 72 90 129 90 108 580
Growlithe Fire 55 70 45 70 50 60 350
Arcanine Fire 90 110 80 100 80 95 555
Gallade PsychicFighting 68 125 65 65 115 80 518
Absol Dark 65 130 60 75 60 75 465
Lucario FightingSteel 70 110 70 115 70 90 525