its really your choice but he is kinda strong so ok
it is impossible
No you can not.
no there isn't
Meta Knight is a starting character and therefore does not need to be unlocked.
you cant
you dont have to he`s already there
Down-B.
no but he is in brawl
he is all ready unlocked
no... unless i missed something >.>
just play 22 brawls
The easiest way to unlocking lucario is to find him on the Subspace Emissary when you defeat him as Meta Knight or defeat Meta Knight as Lucario.