Brian Robeson is a book character of Gary Paulsen's whose world was incorporated into the Imagination World
Primeval: New World version
A few years prior to meeting He-Who-Must-Not-Be-Aggravated, Brian witnessed his mother having an affair. In 2030, his parents got divorced and he went to live with his father for the summer. However, the pilot had a fatal heart attack and the plane crashed in the woods. He-Who-Must-Not-Be-Aggravated saw a news report about his disappearance and flew to the location in a Pteranodon morph. He watched over and assisted Brian throughout his time in the woods. Fifty-four days later, Brian left a radio on when he retrieved it from the plane and was rescued. Afterwards, He-Who-Must-Not-Be-Aggravated stayed in touch, coming to visit every weekend. Five years later, Brian has completed training to become a Christian Morpher and goes to live at He-Who-Must-Not-Be-Aggravated's mansion. Their friendship is widely known, to the point where people say "If you see one, the other can't be far away."
Alvin and the Chipmunks
A few months later, Brian accompanied He-Who-Must-Not-be-Aggravated to the theater where the Chipmunks were going to have their big concert. He crouched in the rafters until his Commander called on him and he then Boomerang Threw his hatchet to cut 6 sandbags, which all fell on 6 guards. he then leaped to the ground and knocked away two more guards, before doing a split to defeat the last two. After the events at the theater were over, he traveled back to the mansion, but occasionally comes to visit the Chipmunk's house.
Alvin and the Chipmunks: The Squeakquel
Brian was visiting the house the night after their first day of school, where he and He-Who-Must-Not-Be-Aggravated have a brief conversation in Hork-Bajir, where He-Who-Must-Not-Be-Aggravated instructs him to send all the troops in. He was part of the auxiliary swarm, but is unknown what he morphed.
Hundreds or thousands of other creatures