Bitter Dill can be a very annoying opponent; his tendency to bounce all over the place and his relatively small hitbox (for bosses) makes him difficult to hit. The make matters worse, his main attack will knock you backwards, possibly off a cliff or into some other obstacle, or could just mess up your aim and prevent you from landing any hits on him. Plus, Bitter Dill can spit out pools of goop (similar to the Chomper's Grody Goop) that can prevent you from moving or using your abilities. As such, to defeat him, it is recommended to have at least two Zombies teaming up against him so one can attack while the other is being thrown backwards. Try not to play as Super Brainz, as Bitter Dill's knockback will prevent you from being able to deal any melee damage. All-Star is a good choice for one, as his high health allows him to take the hits while the other Zombie attacks. His Dummy Shield can also help him survive longer. Space Cadet is a good choice for the second Zombie, as she can use Crater Maker while being a Space Station to easily deal lots of damage to the Bitter Dill, while being immune to being knocked back.