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