Jade Dragon

Breeding
You can get this dragon by breeding a Metal Dragon with a Plant Dragon at the Breeding Mountain or Ultra Breeding Tree.

This may also result in a Dragonfly Dragon.

Training Center
The same attack is listed twice in the Training Center. This is not a mistake.

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