As in the characters found only on that console and nowhere elese
Wii: Wiki (used to be Travis Touchdown, but we know what happened there)
PS3: Victor Sullivan (no contest)
360: Marcus Fenix (Icehawk told me he was cooler than Master Chief)
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http://img708.imageshack.us/img708/3824/5959429725f9ecccb086.jpg
http://www.yourgamercards.net/trophy/a/CaptainRockman.png