Boss
Bosses and minibosses in Deltarune are primarily enemies that must be defeated in unique encounters to progress in the Chapter. They can be Darkners or Lightners, have varying difficulty in bullets, and are often capable of altering or moving the bullet board.
Defeating the Chapter's main boss and final boss a certain way can influence how the Chapter's route ends, which transfers via Completion FILE. This contrasts the Shadow Crystal bosses, which are generally optional and do not impact the Chapter's end.
Per community discussion on June 30, 2025, this wiki considers a boss to be a miniboss based on encounter uniqueness, as well as if a unique track plays during the battle.
Excluding Shadow Crystal bosses, they are listed in order of their first appearance. Clicking on the character's image leads to their "In battle" section of their article, while their listed name underneath goes to their main article. Location links go to the section for the boss's area.
| Boss | Type | Track | Location |
|---|---|---|---|
 Lancer |
Miniboss | Rude Buster[note 1] | Castle Town (map link) |
 K. Round |
Miniboss | Checker Dance | Great Board (map link) |
 Clover |
Miniboss | Rude Buster[note 1] | Forest (Clover's area) (map link) |
 Susie and Lancer |
Miniboss | Vs. Lancer | Forest (Thrashing Room) (map link) |
 Lancer |
Miniboss | Vs. Susie | Card Castle (Prison B1) (map link) |
K. Round |
Miniboss | Checker Dance | Card Castle (Floor 5F) (map link) |
 King |
Main boss, Final boss |
Chaos King | Card Castle (Rooftop) (map link) |
 Jevil |
Optional, Shadow Crystal boss |
THE WORLD REVOLVING | Card Castle (??????) (map link) |
| Boss | Type | Track | Location |
|---|---|---|---|
   Sweet Cap'n Cakes |
Miniboss | Cyber Battle (Solo) | Cyber Field (Sweet Cap'n Cakes room) (map link) |
 Berdly |
Miniboss | Smart Race | |
| Miniboss | Smart Race | ||
 Spamton |
Miniboss | NOW'S YOUR CHANCE TO BE A | Cyber City (Spamton's dumpster) |
 Tasque Manager |
Miniboss[note 2] | Pandora Palace[note 1] | Queen's Mansion (Floor 1F) |
 Mauswheel |
Miniboss[note 2] | Pandora Palace[note 1] | Queen's Mansion (Floor 2F) |
 Rouxls Kaard |
Miniboss | It's Pronounced "Rules" | Queen's Mansion (Acid Tunnel) |
 Queen |
Main boss | Attack of the Killer Queen | Queen's Mansion (Rooftop) |
 GIGA Queen |
Final boss | Knock You Down !! | Queen's Mansion (Rooftop) |
 Spamton NEO |
Optional, Shadow Crystal boss |
BIG SHOT | Queen's Mansion (Basement) |
The Weird Route in Chapter 2 changes/replaces the usual bosses and minibosses in Cyber World, from Berdly's second battle onwards.
| Boss | Type | Track | Location |
|---|---|---|---|
 Berdly |
Miniboss | berdly_battle_heartbeat_true |
|
Mauswheel |
Optional, Miniboss[note 2] |
Deal Gone Wrong[note 1] | Queen's Mansion (Floor 2F) |
Tasque Manager |
Miniboss[note 2] | Deal Gone Wrong[note 1] | Queen's Mansion (Floor 2F) |
Spamton NEO |
Final boss, Shadow Crystal boss |
|
Queen's Mansion (Dark Fountain) |
Optional minibosses that appear in Castle Town.
| Miniboss | Track | Time | Location |
|---|---|---|---|
Clover |
Rude Buster[note 1] | Pre Cyber World and Post Cyber World | Party Dojo |
Tasque Manager |
Rude Buster[note 1] | Post Cyber World if recruited | Party Dojo |
| Boss | Type | Track | Location |
|---|---|---|---|
  Lanino and Elnina |
Miniboss[note 2] | Ruder Buster | Desert Board (Pot area to oasis) (map link) |
 Shuttah |
Miniboss[note 2] | Ruder Buster | Island Board (Lost lover island) (map link) |
|
|
Miniboss | It's Pronounced "Rules" | TV World (Cooking Show) (map link) |
 Shadow Mantle holder |
Optional, Boss |
BURNING EYES | Manhole dungeon (map link) |
 Tenna |
Main boss | It's TV Time! | Cold Place (map link) |
 Knight |
Final boss, Shadow Crystal boss[note 3] |
Black Knife | Cold Place (map link) |
| Boss | Type | Track | Location |
|---|---|---|---|
 Jackenstein |
Miniboss | A DARK ZONE | Dark Sanctuary (Dark Zone) (map link) |
 Miss Mizzle |
Optional, Miniboss[note 2] |
From Now On (Battle 2)[note 1] | Dark Sanctuary (Southwest belltower) (map link) |
 Hammer of Justice |
Optional, Shadow Crystal boss |
Hammer of Justice | Study (Fireplace) (map link) |
 Sound of Justice |
Miniboss | Ripple | 2nd Sanctuary (Study) (map link) |
 Titan Spawn |
Miniboss | SPAWN | 3rd Sanctuary (Crumbling tower midpoint) (map link) |
 Titan |
Main boss, Final boss |
GUARDIAN | 3rd Sanctuary (Crumbling tower summit) (map link) |
Optional minibosses that appear in Castle Town.
| Miniboss | Track | Time | Location |
|---|---|---|---|
  Lanino and Elnina |
Rude Buster[note 1] | Pre Dark Sanctuary | Party Dojo |
|
|
Catswing | Pre Dark Sanctuary and post 3rd Sanctuary | TV Studio (Mike's room) (map link) |
