Bombs are a hazard in the game. Bombs usually appears inside fake walls or sometimes in a silver platter instead of food. The black variant of Griffoth will also always drop a Bomb instead of a turkey upon defeat. They explode a short time after being revealed, damaging the protagonist and any enemies caught in the blast.
Shovel Knight and Specter Knight can both knock bombs around with their basic weapons, which is one way to defeat The Dinghy Dropper. Plague Knight however is unable to do this, as he will always prematurely detonate them if he uses any of his personal Bombs.
In New Game Plus, Bombs becomes much more common, as all food stored in platters is replaced with one of them.