Here is the full list of all 28 Supermagical achievements.
Complete all the cities with 3 stars
Complete the Islands in the Sky
Get all Money Bags on the Rainy Sky Islands
Defeat Pride
Buy a developer check
Get all the warlock's level ups
Get all Money Bags on the Snowy Old World
Complete The Old World
Break 10 small pinyatas
Use 10 chewing gums
Use Ogmios with maximum power
Defeat Envy
Shoot Papus without Killing any enemy
Get all the hats and all the pets
Defeat Wrath
Cook the spell "Protection barrier"
Win a level with the wall as closest as possible
Cook the spell "Summon Epic Dragon"
Break 10 big pinyatas
Defeat Lust
Discover The Snowy Old World secret stage
Get all Money Bags on Sunny Easter Lands
Defeat Greed
Discover Sunny Easter Lands secret stage
Defeat Gluttony
Defeat Laziness
Get 9 items on a single play of Manuel's Pairs game
Complete Sunny Easter Land