I am the best weegee from where i come from ( very small group of brawlers but above average none the less). But my teacher has told me i am highly predictable. I play LVL 9 comps and they know my moves like the back of their unhuman abilites. ALso i need to work on spacing. I have been serching for some time and i need some ont to ehlp me on spacing and mxing up my playing style so i wont get beaten bad or flamed for being to predictable. Also i need some one to help me dashdacing.
Your teacher? If you're predictable, you need to mix things up. Also, stop playing level 9 CPU's. And they don't know your every move. They're just quick to put up their shield, attack right away and other stuff you wouldn't expect from a human. Actually all of that is a lie. But just watch how a level 9 CPU reacts and you'll get my point. Don't attack them, just evade them. When you decide to come at them without even bothering to attack, they'll either spot dodge, attack, shield or roll away.
As for spacing, you can only do so much with a character that has one projectile. Spam the hell out of Luigi's Fireballs if you must just to keep your opponent away. You can actually just use your Fireball and approach your opponent like that in hopes that they'll be distracted by the Fireball so you can get a free hit on them. Okay, so back to you being predictable. Your characters attacks are limited and you know how to use the character, so why don't you use Luigi's attacks in different ways?
How do you normally approach your opponent? Do you run at him, walk towards him, let him come to you, what? If you're doing one of those things, cancel that one approach and use another one instead. Same with your attacks. If you're always coming at him with your up aerial when he's in the air, you can either not do that and wait for him to come down to the ground or you can trick him by jumping at him but not using an attack, though I'm not sure you'd want to do that since he could just use his down aerial on you instead. But yeah, if you're predictable, the only answer you're going to really get is to mix it up. How do you mix it up? Stop playing the way you normally do.
Again, you know how to use your character, stop being predictable and use his attacks in different ways than you already do. As for dash dancing, that really isn't necessary. But if you want to know how to do it, just quickly tap back and forth on your analog stick.