History
Rocket Raccoon was a member of the Guardians of the Galaxy and when Groot was kidnapped by the The Collector, he snuck into his museum and was chased by the Collector until he distracted him with a jack-in-the-box with a toy Star-Lord and was able to free Groot.[1]
Rocket would later go on to terrorizing Thanos by stealing his Infinity Gauntlet and using the stones against him before the gauntlet fell off of his hand and back onto Thanos.[2]