Hedgehog Dragon

Breeding
You can get this dragon by breeding a Dark Dragon with an Earth Dragon at the Breeding Mountain or Ultra Breeding Tree.

Breeding a Dark Dragon with an Earth Dragon may also result in a Venom Dragon.

Damage Calculator
To explain, when attacking with Earth, Hedgehog deals double damage against Plant and Dark, half damage against Earth and Metal, and no damage against Water. When attacking with Dark, Hedgehog deals double damage against Water and Metal and half damage against Plant and Dark. When defending, Hedgehog takes double damage from Metal and Ice, half damage from Earth and Fire and take no damage from Electric.

Trivia
Did you know that the Back Spikes of the Hedgehog Dragon is like a Mammoths Horn 5x Bigger & the weight of their tail is 243 kilos like a two heavy US Tanks..