Did we mention Wolverine is a popular character in the Marvel canon? When you have a character who sells comics, a lot of writers like to include him in their books. To that end, Wolverine has been in more super-teams than just about any other Marvel hero; according to Comic Vine, the total is an eye-popping 35 different teams. Some of the highlights include: the X-Men, the Avengers, the Fantastic Four, the Secret Defenders, Clan Yashida, Department H, Alpha Flight, Department K, Team X, Team Weapon X, Devil's Brigade, the Horsemen of Apocalypse...and a whole lot more. That's a whole lot of team-ups for a guy who typically prefers to work alone.
