Ness using his Final Smash in New Pork City
Lucas using his Final Smash in Skyworld
PK Starstorm is the Final Smash of both Lucas and Ness. Once activated, large meteors from the sky start raining down upon the stage, lasting for about 5 seconds, ending in a large shower at the end.
 The Differences
- Ness' Starstorm is blue, while Lucas' is yellow
- Ness' is angled, falling in a fan-shape, while Lucas' falls straight
Ness' Final Smash is probably better, due to the fact that the large shower at the end is angled the opponent and harder to dodge.
You can obtain a trophy of these Final Smash by completing all star mode with the character whose trophy you want, either Ness or Lucas.