When Vin and Dwayne tried to negociate with Troy Winter to get a part of his money, he tricked them to a room where his black tiger was. While they were frightned with the tiger, Troy revealed that he didn't ate for days. However, Vin and Dwayne managed to survive and later on escape, which wasn't revealed how. The tiger was also seen when Troy was laughing maniacally, stating that he is now Extroyer.
Some time between The Thrill of the Hunt and Extroyer Unleashed, Extroyer extroyed his own tiger to get his first mode, which also caused the tiger to become a part of him, thus killing him.
Troy's pet tiger is from the black tiger race. As his race suggests, he is entirely black and has black markings over his body. He also has yellow eyes.
The race of this tiger is the "Black Tiger", which is a mysterious type of tiger that is unknown if it exists or not. A few people claim that they have seen this rare tiger before, but there has been no proof that proves that this animal exists.