Before the battle begins, Baroness Von Bon Bon will be standing in front of Whippet, with a giant candy cane. She will proceed to use her finger to chop her head off (foreshadowing the final phase), then she will be pulled into her castle will the candy cane.
This battle is very unique, because the first three phases are random. There are multiple mini-bosses that she will send out. The mini-bosses in this level are Kernel Von Pop, Sir Waffington III, Lord Gob Packer, Sargent Gumbo Gumbull and Muffsky Chernikov. In Simple mode, you will not encounter Muffsky.
"How's the jaw, ol' chum?"
—Lord Gob Packer, Death screen
Lord Gob Packer is a giant jawbreaker, which will chase you around the map along with a tiny jawbreaker.
It is recommended to use the Roundabout or Chaser, because you are always running away from Lord Gob Packer. It is also recommended to run around in circles by using the given platform. If you ever get in any trouble, if you have the Smoke Bomb charm equipped, you are able to dash through Lord Gob Packer.
Once you defeat Lord Gob Packer, he will stop, then crack into pieces. He cracks layer by layer, then revealing his head, which has cross eyes and a halo on top. He will then fly to the top of the screen. This animation is very long, so you have some time to take a break after you finish him.
"For me, a sweet tooth is fiendishly uncouth!"
—Kernel Von Pop, Death screen
Kernel Von Pop is a giant candy corn. He will go in an 8 like pattern, while sending out mini candy corns that will fly up to the top of the screen.
It is recommended to dash or jump when he gets too close, and to stay away from him while he is airborne.
Once you defeat Kernel Von Pop, he will fly up with his teeth being crooked. He will look crazy, and his layers will jump off then back on.
"I chew 'em up and spit 'em out."
—Sergent Gumbo Gumbull, Death screen
Sergent Gumbo Gumbull is a gumball machine that will run around the map. Occasionally, he will spit out gumballs everywhere, which rain down onto the players. This is actually the easiest of the phases, so do not panic.
It is recommended to try to get close to him and use your Roundabout. Focus on the gumballs and dodge them, left and right. If you have the Smoke Bomb charm equipped, you are able to dash through him. You may use this if needed.
Once you defeat the Sergent, his head will explode and he will run away.
"Straight off the iron and too hot to handle!"
—Sir Waffington III, Death screen
Sir Waffington III is a giant waffle with a butter hat and syrup wings. He will fly around the screen, and occasionally split himself apart, hurting the player.
It is recommended to use the Chaser to get Sir Waffington III. Try to keep distance from it as much as possible, but do not get too close to the castle. In case it gets too close, expect it is disassembling to find a way to dodge. When she splits, the hitbox is divided into nine parts and you can deal incredible damage with Converge.
Once you have done enough damage, Sir Waffington III will once again disassemble, but this time, it does not hurt you.
"Delicious and vicious, while maliciously nutritious."
—Muffsky Chernikov, Death screen
This mini-boss does not appear in Simple Mode
Muffsky Chernikov is a giant cupcake. He will bounce around the map, and when he lands, little waves of icing will come out of him. Muffsky Chernikov is the hardest mini boss out of the five, explaining why he is not played on Simple Mode.
It is recommended to dash through him when he is about to land near you. Beware of his splash damage. Note that you need to dash away quickly before his third bounce instead of sitting there waiting for it to land, as its skill of bouncing from walls is more powerful than Goopy Le Grande's.
Once you have done enough damage, Muffsky will look up at his cherry, which now has eyes. He will start melting while his arms and legs are failing, then the cherry will explode, exploding Muffsky in the process.
During the fight, you will only have to fight three of these mini-bosses (which count as three phases), but beware, since there are slight changes between these phases. During the first phase, you just fight the mini boss. During the second phase, you fight the mini boss while little Jelly Bullies run across the bottom. During the third phase, you fight the mini boss, little Jelly Bullies will run across the bottom, and Baroness Von Bon Bon will start to shoot cotton candy at you, which come in trios. If you are on Expert Mode, then the Jelly Bullies will also appear during the first phase. Note that you can parry some of the Jelly Bullies and the pink cotton candy that she shoots in phase three. You can also shoot the Jelly Bullies while crouching for your own sake.