xD
Oats!! I need lucas tips!!!
Don't play Lucas. He's bad.
But seriously, f-tilt like a beast. Pivot-grab on some character's approaches. Nair/Uair out of shield. Platform camp with dair, and throw out random dtilts and hit them with the very tip of it so that they can trip and you can follow up with a fsmash that they can't punish (if buffered).
PK thunder when they're recovering but always hit with the tail of it. Figure-8 formations, or making a giant "G" with PK Thunder in the area you think they're di-ing towards (mid-air) is the best way to halt their recovery as the little hit-stun of the PK Thunder's tail will cause them to lose altitude. If they're under the stage, hit them with the side of the PK Thunder head and make sure it's perpendicular to where you want them to fly (into the stage or away from the stage; into the stage is better usually.)
Dsmash is under-utilized and is great for reading spot-dodges and rolls; never up-smash unless you know they're going to roll. If you're a beast, you'll dtilt twice, they'll roll through it, and then you buffer the up-smash. This trick really only works once though.
Rope-snake on the recovery when you can, and always aim for the ledge with PK Thunder-2 (when you hit yourself.)
Always auto-cancel your nairs, and know the different heights.
Never PK Fire more than twice. Use the PK Fire to space, never to hit. They can power shield and **** you up.
Don't play Lucas against Marth, Snake, Meta-Knight, Olimar, or Donkey Kong. You're not going to win.
The only high-tiers Lucas can compete with are Falcos, Dededes, and I.C.s.
I don't know about Diddy Kong. I have a feeling it could work, but I'm an optimist when it comes to match-ups (the bane of a low-tier main.)
If you want to be super-cool, just kill someone with an upsmash or bair.
If you want to be an alpha beast, don't do anything in a match for 6 minutes, and still win.
(One of four times I ever gave sincere Lucas advice.)