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Cosmo the Spacedog is a telepathic Russian dog in the Marvel Comics universe. He was created by Dan Abnett and Andy Lanning, and first appeared in Nova vol. 4 #7. Cosmo is the security chief of the space station Knowhere, and a member of the Guardians of the Galaxy.
Cosmo is part of the Collector's Museum, is first seen when he growls Rocket. In a post-credits scene, after the explosion caused by the Collector's slave, Carina, Cosmo appears licking Tivan face which seemed disgusting to Howard the Duck.
Guardians of the Galaxy (TV series)
Cosmo resides on Knowhere as its security chief when he encounters Drax the Destroyer, Rocket Raccoon, and Groot's stick form. He greets the group and escorts them until Rocket and Drax are captured by Knowhere's cords. Cosmo manages to escape with Groot's stick form to warn the Guardians that Knowhere had come alive.
Cosmo appears in the second installment of the series as a non-playable character in the game's Guardians of the Galaxy playset. He is the security chief of the space station Knowhere and guides the Guardians through gameplay.