The key — the Multygely — is not like other keys. It is a treat, so it is crafted by a baker.
Monsters
The 4 Jellies (Blue, Green, Red, Yellow) have the same characteristics. The difference lies in the element of their ranged attack, which also drains the corresponding characteristic (the red jelly hits with Fire and removes Intelligence). They can heal themselves every 5 turns and reduce the damage dealt to them.
Lemon Jelly
Gelée Citron
Lvl 58 to 62
Mint Jelly
Gelée Menthe
Lvl 50 to 62
Strawberry Jelly
Gelée Fraise
Lvl 54 to 62
Blue Jelly
Gelée Bleue
Lvl 46 to 62
Rooms
Room 1
Room
Room
Boss
Royal Lemon Jelly ★
Gelée Royale Citron
Lvl 60
Royal Strawberry Jelly ★
Gelée Royale Fraise
Lvl 60
Royal Mint Jelly ★
Gelée Royale Menthe
Lvl 60
Royal Blue Jelly ★
Gelée Royale Bleue
Lvl 60
Dungeon mechanics
All the Royal Jellies have the same characteristics except for their element of weakness, which matches their color. The Lemon Jelly is weak to Air, for example, and has 50% resistance to the other elements.
They have the same spells as the small jellies but hit a bit harder. The only difficulty comes if your group happens to have no attack in one of the jellies' elements.
Achievements
End of the dungeon
There you go — you'll easily drop what you need from the Royal Jellies if you do the achievements to craft a Jellano!
Click the Zaap to leave the dungeon and end up back in the Jelly territory.