at LV.33
crobat and sableye
at level 33
Crobat can learn Mean look, and there are a few others that I forget.
Raticate, Golbat, Crobat, Haunter, and Gengar
crobat. caught me a latias with an ultra ball. latias is now level 100
crobat
GOLBATI think you can get a golbat or crobat to learn mean look in Pokemon diamond/pearl. you can get golbat almost everywhere.
Zubat, Golbat, Gastly, Haunter, Gengar, Jynx, Crobat, Umbreon, Murkrow, Misdreavus, Smoochum, Sableye, Duskull, and Dusclops can learn mean look by leveling up. By breeding, Grimer, Muk, Ralts, Kirlia, and Gardevoir can learn mean look.
Crobat
Mean Look can be learned by golbat, zubat, and crobat if you want the easy way.
Zubat, Golbat, Gastly, Haunter, Gengar, Jynx, Crobat, Umbreon, Murkrow, Misdreavus, Smoochum, Sableye, Duskull and Dusclops all learn Mean Look by levelling up.
Crobat learns Cross Poison, Screech, Leech Life, Supersonic, Astonish, Bite, Wing Attack, Confuse Ray, Air Cutter, Mean Look, Poison Fang, Haze, and Air Slash.