Mechanics

Ghost
You get a ghost bomb every ten seconds.

Hard Stun
You cannot move until the stun has worn off, you throw your bomb wherever you are aiming at and if you are charging the bat it will swing.

You get hard stunned by fully charged bats or being too close to a bomb blast.

Soft Stun
Similar to hard stun, with the difference that your bat won't be triggered. You get soft stunned by the outer edge of a blast or a to some degree but not fully charged bat hit and by a bomb at high speed (this stun is very short).

Bomb Blast
The amount of force added to objects is depended on the distance to the bomb.

The standard bomb has a 5 blocks wide destruction diameter and approximately 10 blocks wide force added to objects.

Mega Bombs blasts have a 5 block heavy destruction diameter (destroys indestructible), 10 blocks normal destruction and 15 tiles force. (I'm guessing this)