Quack Prep: Deltarune

In the Cyber World, when fighting Berdly on the roller coaster, you must let him hit you with his "Halberd Storm" attack three times. If you have the Duck Hat equipped, Kris will briefly quack. Berdly’s dialogue changes from "Silence, minions!" to "Why do I smell bread?"

That is it. That single emoji sent the feral Deltarune fandom into a spiral. Data miners have since found a variable in the Chapter 3 demo code labeled QUACK_DAMAGE . Does it increase damage? Does it lower enemy defense? Or is it just a variable for a future fishing mini-game?

The theory posits: What if you prepare for the final boss of Chapter 3 (speculated to be a water-based entity) by spending 30 consecutive turns in the Rouxls fight doing nothing but using the "Pirouette" action while wearing the [Jevilstail] and [Duck Hat]? quack prep deltarune

The community theory suggests that is actually Toby Fox’s way of rewarding players who think like speedrunners but act like chaos goblins. It represents the desire to break a game that is about mercy by wielding the most absurd weapon possible: waterfowl. Is Quack Prep Canon? Toby Fox’s Silence As of this writing, Toby Fox has posted exactly one (1) cryptic tweet in response to the Quack Prep hype. He simply tweeted: "🦆" .

If you have fallen down the rabbit hole of Deltarune fan content recently, you have likely stumbled across a bizarre, trending phrase: Quack Prep . It sounds like the name of a scrapped Disney Channel show or a dubious medical degree for ducks, but in the context of Toby Fox’s surreal RPG universe, it is something far more chaotic. In the Cyber World, when fighting Berdly on

In Hometown, visit the pond in the southwest corner during the rain. Throw in the "Mysterious Key" (found in Asgore’s flower shop). You won't get the hat until Chapter 2, but the game flags this interaction as Duck_Flag_Active .

We don't know. But that is the beauty of . It is a ritual. It is a belief system. It is the act of staring at a game that broke your heart ( Undertale ) and a game that refuses to finish ( Deltarune ), and instead of crying, you simply put on a duck hat and press Defend. Conclusion: Should You Try Quack Prep? If you are a completionist who needs to see every line of dialogue, yes. If you are a streamer looking for a unique viewer challenge, absolutely. If you are a casual player who just wants to listen to "Big Shot" and cry, skip it. That single emoji sent the feral Deltarune fandom

For the uninitiated, Deltarune —the sister game to Undertale —is known for its strange humor, secret bosses, and a battle system that punishes mindless violence. But isn't an official chapter. It isn't a mod (yet). It is a fan-made concept, a challenge run, and a meme that has taken over the Deltarune subreddit and TikTok theory circles.