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