Eclipse

Eclipse is a puppy just like Courtney. She is blue with a sparkling black collar and two blueish bows. She was used for evil just like Cynder. After Yveltal did some destruction years ago, she was separated from Diancie's Carbink elder and was corrupted by the villain's dark, poisonous powers so she can do their bidding and evil work. But, she was defeated and returned to her normal self thanks to Courtney and the Thunderbolts.

Trivia:

 * She has a boyfriend named Patches who works with the Pound Puppies.
 * Eclipse is also good friends with Lapis Lazuli due to having one thing in common: Being used for horrible reasons or evil.