Adamant Zoroark
catchy catchphrase
In theory, Substitute would be nice. However, Sub + NP/SD means removing one of Lucario's attacks. Most of the time, this will be either ExtremeSpeed or Vacuum Wave. Both are moves I find to be a necessity when using either Swords Dance or Nasty Plot Lucario (respectively). Lucario absolutely needs the priority. If something faster than Lucario comes in on it and Luke doesn't have a sub, you can expect Luke to go down quickly. I say stick with plain old SD Lucario. ExtremeSpeed is too good to give up, and getting rid of Crunch or Ice Punch means getting stopped cold by any Ghost-type Pokemon. Substitute just isn't worth it.