I'm sorry to ask, but does anyone know how to approach properly with Lucario? I keep on resorting to dash attack every so often that I swear it's by nature.
You really don't approach. Although dash attack is our fastest move grounded (assuming you are dashing already...) it's not safe on shield in the slightest, or even after a clank.
I mean if you really outskill your opponent you can wavebounce into them or approach with dash/pivot grabs, but better players are going to dumpster you doing it too much. Even then, a few % generally isn't worth a chance at being punished...
Really, when our fastest option out of shield is grab, its best to just let them come to you. Generally this is why Lucario is awful against campy characters until AS starts going thru their projectiles.
On a different note, I feel like our lack of out of shield options really causes bad habits in Lucario mains when we start to get pressured. Even watching Junebug I noticed against pressure he started rolling backwards a lot, especially when the opponent figured out dash grabs basically **** on us if we improperly space AS. Spot dodge just isn't good enough to beat out good grab game reliably and when our Jabs and tilts are slow as ****, might as well sit in shield and grab em and hope they don't do the same. Learning to move away from approaches to be able to space tilts and smashes (against slower chars...) and AS is pretty key.
tl;dr unless you are punishing laggy moves, don't approach good players lol; that is what AS is for generally.