I think I may have some ideas for customs and final smash.
Neutral 1: PK Blizzard - Slower, and can't move far to the side, but is powerful and freezes long. About 25-30 damage.
Neutral 2: PK Flash - Kinda how PK Flash works in Project M, except maybe less powerful than Ness' PK Flash? I dunno. 18-22 damage.
Side 1: PK Ember - Doesn't launch and is faster and spammable, sorta like fast fireball for Mario. 2-4 damage
Side 2: Lasting PK Fire - Like Ness'. Goes down diagonally in the air and ensnares people. 7-10 damage.
Up 1: Meteor PK Thunder - A slow moving, ball that, if you land, will meteor smash your target. Very good for recovering. PK Thunder 2 doesn't deal damage though. 9 damage.
Up 2: One Hit PK Thunder - Ness' PK Thunder. PK Thunder 2 hits once and is very powerful. PK1- 9 damage PK2-25 damage
Down 1: Lifeup - A Green pulse (like in 64) that heals Lucas about 4-5 damage per sec. Can't absorb projectiles and doesn't damage enemies.
Down 2: Closed PSI Magnet - A big pulse held close to Lucas instead of out in front of him. Heals more from absorbing projectiles and pushes enemies away. 2-4 damage.
The Final Smash would be the same as Ness' PK Starstorm, except that his stream is less powerful, but more wide.
Just my thoughts.