www.gameanyone.com The ending of the game. This features a voice acting sequence by Dan Owsen, who was behind the voice acting of this game. Next one is the credits Video walkthroughs: www.gameanyone.com
UPDATE: Apparently Jay Hopper did "bit parts" for this and other Nintendo games. Since Pepper appears to be the only other character with a voice in this game Pepper must therefore be voiced by Hopper.
Regarding the voice acting, I think Owsen only did the "Emergency! Emergency!..." bit during the Emergency Call at the beginning of the game (where his voice is the same as the Super Metroid intro voice (i.e. his regular voice). Fox is done by someone else (most likely an English-speaking Japan resident), as he says "Wing Repaired" as "Wing We-peared" (in addition to the "Cornelia/Corneria" bit at the end of the game. As for General Pepper, it could be Owsen, but it can also be someone else.