Bowser Bomb is the Down Special Move move of Bowser. If Bowser is in midair when using this move, he slams to the ground with a butt-stomp. If he's on the ground doing this, he will leap forward diagonally before performing the butt-stomp. In Super Smash Bros. Brawl, Bowser gains some hyper armor at the start-up of the move. Noted in Super Smash Bros Brawl this move can be used to combo enemies.
The Bowser Bomb is also good for edgeguarding. If Bowser does it in the air and just brushes the edge he will grab on making good for edgeguarding. This technique is good to use on people trying to recover. Also by doing this, instead of suffering lag from landing on the ground you can just grab the edge. Bowser can also use it on someone who is hanging on the edge and he will knock them off it and he will grab on instead. It is unsure whether you have to hold the direction on the analog stick according to what side the edge is on or if you can just Bowser Bomb and he will aoutmatically grab on.
This special attack is shared by Giga Bowser, both in his boss appearance Super Smash Bros. Melee and in his playable appearance in Brawl.
Yoshi has a similar move, the Yoshi Bomb though it produces disruptive stars upon landing.
The move is based on Bowser's attack pattern in Super Mario Bros. 3