Which Fire Emblem game has a character named Marth?

Marth is in:

Fire Emblem: Ankoku Ryuu to Hikari no Tsurugi

Fire Emblem: Monshou no Nazo

Fire Emblem: Shadow Dragon

Fire Emblem: Shin Monshou no Nazo - Hikari to Kage no Eiyuu

He is also 'in' Fire Emblem Awakening, but only is available as add on content