Here is the full list of all 31 Rhythm Sprout: Sick Beats & Bad Sweets achievements.
Got all achievements in Rhythm Sprout!
Get 25 CDs.
Get to the finish line with every unlockable skin.
Clear 10 Levels in Turbo Mode.
Clear 5 Levels in Random Mode.
Hit 20 Trap Notes in one level.
Clear 5 Levels in Mirror Mode.
Get one of the Target Scores in any level (no more, no less).
Listen to the same loop over and over again.
Answered YES on every question at least once.
Answered NO on every question at least once.
Rewatched a cutscene multiple times.
Finish the Side Story.
Defeat Mrs. Chili.
Defeat The Power Peppers.
Your love of trap doors knows no bounds.
Finish the Main Story.
Defeat K-FLOW.
Be very interested in Sugar Daddy's story.
"Defeat" King Sugar Daddy.
Clear All Bonus Levels.
Wear an unlockable skin for multiple levels.
Get 100 Stars.
Defeat Candy Mama.
Get 10 CDs.
Get 50 Stars.
Die several times in a row.
Defeat Count Arelle.
Fall through Count Arelle's trap door.
Get your first CD.
Cleared the first level.