Tips Dragon City

Earth + Fire = Flaming Rock or Volcano.
Earth + Plant = Tropical or Cactus.
Earth + Water = Mud or Waterfall.
Earth + Electric = Star or Chameleon.
Earth + Ice = Alpine.
Earth + Metal = Armadillo.
Earth + Dark = Hedgehog.
Fire Dragon Hybrid Generation 1

Fire + Earth = Flaming Rock or Volcano.
Fire + Water = Cloud or Blizzard.
Fire + Plant = Firebird or Spicy.
Fire + Electric = Laser.
Fire + Metal = Medieval.
Fire + Dark = Vampire.
Water Dragon Hybrid Generation 1

Water + Earth = Mud.
Water + Fire = Cloud or Blizzard.
Water + Plant = Nenufar or Coral.
Water + Electric = Lantern Fish or Storm.
Water + Ice = Icecube or Ice Cream.
Water + Metal = Mercury.
Plant Dragon Hybrid Generation 1

Plant + Earth = Tropical.
Plant + Fire = Firebird or Spicy.
Plant + Water = Nenufar or Coral.
Plant + Ice = Dandelion or Mojito.
Plant + Metal = Jade.
Plant + Dark = Carnivore Plant or Rattle Snake.
Electric Dragon Hybrid Generation 1

Electric + Earth = Star or Chameleon.
Electric + Fire = Laser.
Electric + Water = Lantern Fish or Storm.
Electric + Metal = Golden Or Battery.
Electric + Dark = Neon.
Ice Dragon Hybrid Generation 1

Ice + Earth = Alpine.
Ice + Water = Icecube or Ice Cream.
Ice + Plant = Dandelion or Mojito.
Ice + Medal = Platinum.
Metal Dragon Hybrid Generation 1

Metal + Fire = Medieval.
Metal + Water = Mercury.
Metal + Ice = Platinum.
Metal + Plant = Jade.
Metal + Electric = Golden or Battery.
Metal + Dark = Zombie.
Dark Dragon Hybrid Generation 1

Dark + Earth = Hedgehog.
Dark + Fire = Vampire.
Dark + Plant = Carnivore Plant Or Rattle Snake.
Dark + Electric = Neon.
Dark + Ice = Penguin.
Dark + Metal = Zombie.
Dark + Mud = Poo.
Generation 2 Dragon Breeding – Hybrid Rare

Mud (Earth + Water) + Dark = Poo.
Medieval (Fire + Metal) + Alpine (Ice + Earth) = Cool Fire Or Soccer Or Pearl Or Armadillo Or Flaming Rock
Neon (Dark + Electric) + Nenufar (Water + Plant) = Pirate.
Zombie + Mud (Earth + Water) = Petroleum.
Laser (Fire + Electric) + Dandelion (Plant + Ice) = Gummy or Fluorescent or Laser.
Special Notes:
Cool Fire can also be obtained through Laser (Fire + Electric) and Dandelion (Plant + Ice), Firebird and Ice.
Armadillo can also obtained through: medieval + alpine, pearl + alpine, jade+star, Zombie + Mud, and Pearl + flaming rock dragon
Gummy can also be obtained through: Firebird + fluorecent, firebird + star, Jade + star, and neon + nenufar
Pirate can also be bred from: Rattlesnake + lanternfish and neon + cloud
It should be additionally noted that Medieval + Alpine dragon is one of the best dragon breeding formula in Dragon City because of its ability to bred different types of hybrid rares.
Generation 3 Dragon Breeding – Legendary

Legendary Dragon – Cool Fire Dragon + Soccer Dragon
Crystal Dragon – Coolfire + Soccer
Mirror Dragon – Gummi Dragon + Cool Fire Dragon
Wind Dragon – Gummi Dragon + Cool Fire Dragon
Dragon City Opposing Element Breeding