Lil Wayne -- I'M IN TONY HAWK VIDEO GAME ... With Magical Crotch Powers

Lil Wayne just got the ultimate compliment as a skater -- he's now a playable character in the new Tony Hawk Pro Skater 5 video game ... and he's PUMPED about it!

In fact, Weezy sat down with Tony and Conan O'Brien to take the new game for a test drive ... and it's pretty hilarious.

Wayne's been skating for years -- and has earned some serious respect from some of the pros.

Hawk has teased that other celebs will be featured as secret characters in the game ... and specifically mentioned "musicians" ... so the question is -- Bieber???