Almost all new cars have star attacks.

Lunar Loader: Shoots blue lasers (6 to 11).
The Corporal: Shoots cannon balls that makes shockwaves (1 to 30).
Skull Diggury: Purple Shockwave that makes opponent move to the end rail (1).
Big Rock: Drops rocks from the back (1-3).
Concept 3000: Boost lasts longer and faster (1 to 3, rarely).