This guide will show you how to find and fight each of the Shadow Crystal bosses from Chapters 1-4 in DELTARUNE without spoiling their identity or mechanics.
All Secret Shadow Crystal in Chapter 1-4
Unlocking the hidden Shadow Crystal bosses in DELTARUNE can be one of the most thrilling experiences in the game. Whether you’re exploring the mysterious corners of the Dark World or unraveling secret pathways, each chapter offers a unique challenge and reward.
Chapter 1: The Beginning
To access the Shadow Crystal in Chapter 1, you’ll need to follow a hidden questline that begins near the end of the Dark World.
How to Start the Quest:
Once you reach the Castle’s first floor, take the elevator and choose the option marked ?????? to reach the dungeon.
Interact with the mysterious voice behind the door.
Finding the Key Pieces:
- Talk to Seam – Use the Warp Door in the Castle to travel back to the Fields of Hopes and Dreams. A new dialogue option will appear: “Strange Prisoner.” Seam will provide the first key piece and a cryptic hint: “Walk where the stars don’t shine.”
- Solve the Forest Path – Go to Scarlet Forest. Near the Scissor Dancer area, you’ll find a hidden path by walking through the starless section of the dark area. A chest here contains the second key piece.
- Card Puzzle Challenge – In the area before the Great Board, go northeast and solve the card suit puzzle in this order: Diamond, Heart, Club, Spade. This gives you the final key fragment.
Unlocking the Fight:
- Visit Malius at the Bake Sale to forge the Door Key.
- Return to the Castle dungeon and use the key to open the mysterious door.
- Defeating the boss grants a powerful reward, including:
- An axe for Susie that boosts both attack and magic, and reduces TP cost for Rude Buster.
- An alternative armor that increases all stats.
- Afterward, talk to Seam for additional lore dialogue.
Chapter 2: A Cyber’s World
Chapter 2’s Shadow Crystal boss involves a more tech-centric side quest hidden deep within the Cyber World.
Start by Helping the Hacker:
- In Cyber Field, after the Bagel Stand area, head south to find the first checkmark (look for a pop-up that says “Stupid”).
- Continue to the tea cup ride section. Ride the middle teacup for the second checkmark.
- For the third, solve the puzzle to the left of the teacups.
- Return to the Hacker NPC to finish this step.
Unlocking the Secret Area:
- Continue the story until you meet Spamton—make sure to spare him or you’ll be locked out of the Shadow Crystal fight.
- Once you reach Queen’s Mansion, use the Warp Door to return to the Trash Zone, then visit Spamton’s shop.
- Purchase the KeyGen—item prices fluctuate, but selecting one will freeze the cost.
Exploring the Basement:
- In Queen’s Mansion, look for the Hacker pacing in a long hallway (near the car sections). He’ll reveal a hidden switch.
- Use the KeyGen to enter the basement, explore until you find a machine and obtain the EmptyDisk.
- Return to Spamton’s shop, get the LoadedDisk, and go back to the machine.
Rewards from the Fight:
Depending on how you handle the fight, you can earn:
- A scarf for Ralsei with enhanced attack stats.
- Or an armor that increases both magic power and Dark Dollar gain by 30%.
Chapter 3: Late Night
This chapter contains the most intricate Shadow Crystal questline. Missing steps can lock you out, so proceed carefully.
Essential Preparation:
- To unlock the fight, you must earn S-Ranks on both game boards.
- Board 1 Tips: Grab all four keys.
- Board 2 Tips: Eat moss, find the green spring.
- Maximize TP bonuses during encounters to boost your score.
- If you’re struggling, a Pippin in the Green Room can help secure your rank.
- Alternatively, Susie can pull weeds to earn points for board ranks.
Backstage and Ramb’s Game:
- After clearing both boards, enter the door labeled “S” to go backstage and start Ramb’s Game.
- Game 1: Reach LV 3, destroy the cactus, then smash trees to find a chest with the Ice Key.
- Game 2: Reach LV 2, use the raft, and melt the ice blocking a path. Solve the maze with a helper character.
Final Challenge:
- Continue through TV World until you re-enter the Green Room.
- Go backstage again, acquire the ShadowMantle, and equip it (recommended: Susie).
- Progress to the final boss fight extremely difficult without the mantle.
Victory rewards include:
- High-end gear and one of the toughest but most rewarding boss fights in the series.
Chapter 4: Prophecy
The final Shadow Crystal fight in Chapter 4 is locked behind a piano puzzle and exploration.
Starting the Quest:
Interact with the painting in the Old Man’s study titled “Legend of the Magic Ax.”
Your goal is to gather pieces of a musical sheet to unlock a hidden door.
Sheet Music Locations:
- Waterfall Path: Near where Bibliox can spawn, donate 100 Dark Dollars to reveal the first path.
- Cliff Climb: Return to the bookshelf near the study, head right, and scale the cliff.
- Darkness Area: Backtrack to the area before the study, then climb left to find the final piece.
Final Boss and Reward:
- Once the sheet is complete, solve the piano puzzle to face a hidden boss guarding:
- Susie’s most powerful ax to date.
Collecting every Shadow Crystal in DELTARUNE is a challenging but immensely rewarding experience. Each chapter offers a unique twist on exploration, puzzle-solving, and combat. These hidden bosses not only deepen the game’s lore but also equip your party with some of the most powerful gear available
Quick Tips:
- Save often in multiple slots.
- Always choose non-lethal options if unsure some fights lock rewards if defeated the wrong way.
- Complete side quests thoroughly to avoid missing key items or NPCs.
- Stay determined and good luck uncovering all the Shadow Crystals!
