Murkrow, the Darkness Pokémon
Insomnia: Prevents sleep. OR.
Super Luck: Grants any regular move you use to have a 12.5% chance for Critical Hit.
Peck, Astonish, Pursuit, Haze, Wing Attack, Night Shade, Assurance, Taunt, Faint Attack, Mean Look, Sucker Punch, Tailwind, Foul Play Torment, Postpone
Ketamine; Explaining critical hit ratios for Super Luck.