Rattlesnake Dragon

Breeding
The Rattlesnake Dragon is a hybrid dragon which can be produced by Breeding between a Hedgehog Dragon with a Butterfly Dragon at the Breeding Mountain or Ultra Breeding Tree. This combination can also result in creating the Carnivore Dragon.

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

Counter Dragons
These are dragons that are best suited to defeat this dragon in Combat and there can be any number of good counter dragons:

Trivia

 * This dragon can be obtained on a carnival event (12/09/12) - (16/09/12), to get it, you need to get 3 correct answers
 * The Rattlesnake Dragon bears little to no draconic traits. It appears to be more of a cross between a Rattlesnake and a Cobra.
 * In many depictions, Snakes and Dragons are closely related.
 * This is the only plant dragon to not have any plant based moves