Brandon Caine is a character from the second Action Man TV series.
2000 TV series
Brandon Caine was an extreme sports star who was a friend/rival of Alex Mann. The villainous Dr X upgraded Brandon's body so that he could compete with Alex.
In hopes to find a cure for the upgrade done on Brandon. Alex and Brandon return to Dr. X's lab, but there is only one problem; it is on the bottom of the ocean. There, Dr X captures them and tries to transfer his mind into Brandon's body. Action Man and Brandon escape while Dr X seemingly drowns, but later it's found that Dr X was successful transferring his mind to the body and Brandon is seemingly lost forever.
Some time later, the nanotechnological Trillabugs of Dr. X go on a rampage which puts the entire world in danger. This causes the most unlikely alliance with Dr. X and his Council of Doom and Action Man and his Team Xtreme.They stop them, but the Trillabugs morph into a giant version of Brandon Caine and heads out to attack Washington, D.C., so Alex and Dr. X team up again. It's revealed that after Dr X took Brandon's body, Brandon's mind went to the Trillabugs and lost control trying to stop Dr X. After the Trillabugs are stopped, Brandon's mind is transferred to a new body.