You can add lazer ball and sticky ball

Speedslam

Hybird ball: When this collides with 2 balls, a 2.5% chance its become a hybird ball with all the properties that the two balls have.

You can add this: Bouncy ball Special ball: When this collides with the block, a 1% chance its go through the block and increase 1-3 power!

Fall ball: ball that slowly moves down including thru walls