He may attempt to use Reversal on your Stickybombs, be smart and don't aim directlly at him. He can still be hit by behind and the sides, a sticky bomb over him can deal significant damage, while he's unable to react.

You accidentally shot your bombs in Androxus reversal? You can use your Poppy bomb to dodge it.

You can catch Bomb King's sticky bombs easily with Reversal, the sticky also has a lot of damage making the Reversal deal a lot of damage

try to create a distance with the bomb king and pocket him from this hight distance! Its gonna be much easier with the "cursed revolvere" ability.