Back in the thread again yai :3
Lucario, eh I don't really know any good ones here 'cuz everyone here doesn't play him (bores everyone srsly)
But anyway, to my application against Lucario:
Early phase: (0%) This should be to your advantage since you can easily have him off the stage with a throw, in this phase, try to gimp as EARLY as you can, this has the obvious benefit of a stock gap, now keep harassing him with spring when he tries to recover, eventually friggin pray he screws up with his UpB. (if the Pro Lucario isn't darn good I guess or "He haz to screw up at least f'ing once I just know it >.<")
Mid phase: (<45%) if earlyphase failed, baiting is the 2nd best option as its easy to take advantage of his lag, idk what much to do except try taking advantage of B+ momentum, run to him like from 1/2 of FD, then go with SH Nair, it has a high chance to hit, or you could do it off range and attempt a dtilt, followed by whatever move. At this point it's a bit harder to get him offstage, I recommend doing ccancelled running Dsmashes.
Note: Aerial game isn't very strong against Lucario, so keep it at a bare minimum
I only recommend Run(+momentum) to SH Nair, its sex kick-ness makes it a viable tool.
(hypothesizing, SH bair when Lucario approaches/ dash attacks might work, MIGHT)
Late phase: (<80) Seems you've screwed up killing him from the first two phases, if you're high up in %, go defensive, I recommend to keep poking. Be careful of Lucario's moves that have a barely noticeable hitbox still present, at this point he can kill you once you screw up. Same as Mid phase, try using the running Dsmash again, if he gets offstage no matter how far, try landing a Spring in safe range (Sonic has a vertical advantage over Lucario with no move other than uair so give it a shot)
No don't throw pie at me >.< I haven't met any good Lucarios here so just see if these work to your favor.