See the related link for the full list.
Is mean look
Eventually if you level up your Pokemon then it will learn the move mean look. For example watchog will learn mean look
Gastly should learn mean look at level 8 :)
It learns Mean Look at level 64.
Level 8
at level 35
If you evolve zubat to golbat it learns mean look at level 33
zubat and its evolutions learn mean look at level 29-33
Lv 38
golbat can learn mean look
At level 29 zubat or Golbat learns the move Mean look.
watchog can learn mean look at level 36, hypnosis at level 18, super fang at level 22, and hyper fang at level 32, thus making it a perfect pokemon for capturing other pokemon. the only flaw is that he cannot learn false swipe.