Mean look

Mean Look is a move learnt by Pokemon such as Zubat/Golbat, Gastly/Haunter/Gengar and Duskull/Dusclops. Its effect is identical to the move Block, which is to prevent the user's foe from escaping.

Mean Look has proved most useful to players striving to catch "run-aways", Pokemon (usually Legendaries) that run away immediately upon discovery.