In the board room at the end, you don't need to rescue that guy to get shrykull power! (unless trying to save all mudokoens) Or should I say, you don't need shrykull power to finish the game. All you need to do is fall down the trapdoor, go over and pull the lever, and get shot!
(Don't worry it's part of the plan.) Then you will get captured by the other sligs who come down and get you. Cool huh?