Blitzwolfer

Benwolf is the Codon Stream's DNA sample of the Loboan species, which is native to the Anur Transyl moon Luna Lobo. Because no one knew a name for it besides Benwolf, they called it a Yenaldooshi, which refers to a skin-walker, an equivalent of a Werewolf. Benwolf is voiced by Tara Strong.

History
Benwolf first appeared in the episode Benwolf, when Max goes to see an old friend who lives in New Mexico. In the episode, the Yenaldooshi, and after some continued fight Ben's Omnitrix is scratched (with no damage on it) by the wild Loboan. Because this is the first time that an alien DNA is added through contact, the transformation is gradual instead of instantaneous (like a werewolf).

Abilities
Benwolf is very muscular, tall, has dog-like back legs, stands on his back legs, and has a face and muzzle that looks like a Mexican wolf's face and muzzle. It also has many animal-like tendencies.

Benwolf has enhanced strength, speed and agility; supposedly being able to lift approximately 500 lbs and run over 70 mph. In addition to Benwolf's formidable claws, fangs, and muscles, he can emit a ultrasonic howl if the parts of his quadra-hinged muzzle is opened and a shout is let out. He can also do a jump attack by using his claws to slash the air.

Weaknesses
Even being stronger than a human, its strength is still less than those of Fourarms. It can also be affected by many other normal attacks. Ultraviolet light may blind him. Benwolf is colorblind so it is hard for Ben to distinguish anything but black and white, it is only an issue when trying to figure out what is around him when looking straight on. Benwolf finds it hard to resist animal like tendencies, such as hunting rabbits.

Ultimate Alien
Dwayne McDuffie confirmed that every alien in the opening will reappear,will return in Ben 10: Ultimate Alien. His muzzle is white, his mouth isn't green anymore, the symbol is on his chest, and his fur color its light grey instead of dark blue. Also Benwolf looks more muscular than in the original series.