First, this may be a thing already but R.O.B. has a wavedash! I call it MechDashing. You can do it by jumping and IMMEDIETLY dairing. Or, alternetivey, you can use the c-stick and tap jump with a tap up on the analog stick and a tap down on the c-stick. Its (I think) longer than luigis', making it the longest wavedash ever. It's really useful. Next, Ness can do a combo like thing where if you footstool, IMMEDIETLY down-b, then repeat again. This is %100 true and can combo into a lot of things. Finally (for now), Lucas can cancel all landing lag on his PK Fire, giving him a lot of ground momentum if hit right, if hit in an even more titghter frame, you can send out the move and keep the momentum, or use in in air to recover verticly, much like luigis' misfire. It can also get you away from your opponent, saving you from sticky situations.