Here is the full list of all 16 Dark Paradise Nigelopia: Mini Mix achievements.
Finish the game for the first time as Nigel.
Finish the game for the first time as Reina.
Finish the game for the first time as Shauna.
Finish the game for the first time as Rachel.
Finish the game as all four playable characters for the first time.
Get all 7 Nigelopian Booty Detectives into the same room.
During a stage, idle as Nigel for so long that he....
During a stage, idle as a girl for so long that she...
Defeat Mega Umbradorior as Nigel
Defeat Mega Umbrincess as Nigel
Witness Scarlet.
Watch Shauna sleepwalk.
Make Reina and Rachel... enjoy each other's company.
Get Suckadear to drink of Rachie.
Make Reina and Shauna... have a good time.
Make Rachel and Shauna... feel great together.