Title: Pokemon Movie 8: Lucario and the mystery of Mew characters
Ash
Ash's pikachu
Ash's Grovyle
Ash's corphish
Ash's phanpy
Ash's swellow
May
May's squirtle
May's combusken
May's munchlax
Max
Brock
Brock's foretress
Brock's mashtomp
Kidd
Kidd's weavile (1)
Kidd's weavile (2)
Sir Aaron
Sir Aaron's lucario
Sir Aaron's pidgeot
Lady Rin
Lady Ilene
Jessie
James
James' Chimecho
James' cacnea
Meowth
Lady Ilene's servant
Mew
Benks
red Army
Green Army
and a lot of wild pokemon
I think that's about it about the characters in this movie...if theres some missing feel free to correct my errors :D