Here is the full list of all 66 Super Mombo Quest achievements.
Defeat the King of Nightmares
Collect all game coins
Reach the Maleficent Momboland region
Rescue the animals in the Tree
Equip the Grandfather Clock
Buy all items from Alfred
Equip the Locket of Renewal
Equip the Belt of Longevity
Equip the Heart Stone
Equip the Crystal of Power
Equip the Lucky Underpants
Equip the Platinum Armor
Buy all Philomen upgrades
Buy the Natural Boost upgrade
Buy the Gentle Combo upgrade
Defeat the Green Smasher
Rescue the animals in the Desert
Rescue the animals in the Maze
Buy the Crystalline Hunger upgrade
Buy the Unstoppable Drive upgrade
Buy the Rock Shield
Defeat the Evil Pigosaurus
Rescue the animals in the Pyramid
Rescue the animals in the Volcano
Defeat the Lasercat
Collect 200 coins
Reach the Prismatic Pyramids region
Buy the Lightspeed Dive upgrade
Buy the Electric Duality upgrade
Buy the Punch of Steel upgrade
Defeat the MegaDrill
Buy the Max Life upgrade
Equip the Magical Coin
Reach the Desolate Desert region
Collect 150 coins
Reach the Mechanical Maze region
Buy the Volcanic Shield upgrade
Buy the Flaming Stomp upgrade
Rescue the animals in the Forest
Reach the Towering Tree region
Defeat the Swine Emperor
Equip the Guardians' Shield
Equip the Ring of Revenge
Buy the Extra Slot upgrade
Reach the Voracious Volcano region
Collect 100 coins
Equip the Magic Magnet
Buy all Ursula upgrades
Buy the Reveal Fountains and Totems upgrade
Buy the Reveal Secrets upgrade
Buy the Reveal Nearby upgrade
Rescue the animals in the Mountains
Store 15,000 crystals
Rescue Adamastor
Store 10,000 crystals
Collect 50 coins
Reach the Fungal Forest region
Defeat the Pigosaurus
Store 5,000 crystals
Rescue Ursula
Equip the Crystalline Piggybank
Rescue Alfred
Rescue Philomen
Reach the Monster Trail region
Rescue Thoma
Open a chest