Lucas seems extremely powerful because of the versatility he posesses. He's lacking Ness' raw killing power for a more defensive approach.
First up, his pk fire doing 9% is just too bloody good for such a fantastic spacing option. The air momentum you get is great, it has two hits so it can blow up in your face if you clank it with something and leaves opponents in a very bad position because of the knockback. It's a fantastic gimp tool as well.
Rope snake is amazing as well, gotta hand it to the little guy. It's pretty fast for a tether and doesn't have much recovery. All 4 throws are fantastic. Up throw and back throw will kill ( at less ridiculous % than ness) while down throw combos until very high % and you can get a kill with bad DI. Really helps the recovery as well
Pk thunder is fantastic as recovery, harder to gimp and insane distance and is a fantastic projectile for harrasment. Not sure if a well placed aerial will make it disappear, soft hits like my grapple beam won't
Pk vacuum is fast, heals a lot, has a hitbox and can be used for air stalling. Amazing smashes and tilts. His aerials are just good other than nair which is also amazing.
Great character, I'm not gonna call him a shit head cause I love mother 3 but Sakurai pls