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