Here is the full list of all 12 Rise of the Funkys achievements.
Complet the first stage.
Complet the second stage.
Complet the third stage.
Complete the fourth stage by defeating Robota.
Complete the fifth stage.
Complete the sixth stage by defeating Brutalinda.
Complete a level without losing any characters.
Defeat 25 enemies with Negone.
Defeat 25 enemies with Echinacea.
Defeat 25 enemies with Kadevil.
Defeat 25 enemies with Makronos.