Rodney Mullen debuted in the Tony Hawk's Pro Skater 2 roster and is famous for pioneering freestyle skateboarding tricks.
Mullen was one of the real professional skaters featured in the 2000 game. His inclusion reflected his enormous influence on technical street skating: he developed or popularized foundational flatground maneuvers such as the kickflip, heelflip, 360 flip and impossible. His precise, compact style made him especially associated with freestyle and technical trick skating.
The other options were also real skaters in the game. Rune Glifberg, Bucky Lasek and Jamie Thomas appear among Pro Skater 2's professional roster, which makes the question a roster-recognition challenge rather than a distinction between fictional and real characters.
Pro Skater 2 originally featured ten professional skateboarders in its main roster, with additional characters and version-specific content. Mullen returned in later Tony Hawk games and became one of the franchise's most recognizable technical skaters.