Well if this is in a newer game a Lucario would be able to mega evolve. Although Glaceon is a really cool pokemon.......
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TooBlue12
Midnight Heart
Unfortunately, I don't have Xy, or as, or sm, so I couldn't mega evolve lucario. That and I have no clue about mega evolution.... Zoey the espeon: YOU BETTER NOT REPLACE MW WITH A GLACEON! Calm down Zoey... I'm planning on replacing Electra the manetric with either Lucario or Glace on... not replacing you...
TooBlue12
Well Lucario is still a fantastic pokemon even when it can't go mega. Of course a Glaceon is an ice type so it could help you against Dragon if needed.
Midnight Heart
That's what I was thinking about Glaceon. Its good against dragon types, and its usually a pain in the tail for me to beat them. Bad thing is, I have a name for a female lucario, but no name for a female Glaceon.