Here is the full list of all 29 Creepy Castle achievements.
Eat some food.
Eat some damage.
Excel at some duels!
Fight some enemies!
Complete Scenario 1: Creepy Castle.
Complete Scenario 2: Ghostly Mystery.
Complete Scenario 2B: Lost.
Complete Scenario 4: Due Exaltation.
MMMMMMMMysterious things happen on the title screen...
Get to know the colorful locals of a big city!
Eat a lot of food.
Eat an enormous amount of food.
Fight a lot of enemies!
Fight an enormous amount of enemies!
Excel at a lot of duels!
Excel at an enormous amount of duels!
Eat a lot of damage.
Eat an enormous amount of damage.
Find a special guest hidden deep in The City of Light...
Find a special guest hidden deep in the Ghost Palace...
Find a special guest hidden deep in the Depths...
Find a special guest hidden deep in space...
Defeat the ultimate opponent...
Complete Scenario 5: The Final Fist.
Complete Scenario 3: Depth.