Marth is the first and most iconic protagonist of the Fire Emblem series of strategy-RPGs. Marth was the main character in the very first Fire Emblem game, Shadow Dragon and the Blade of Light, released for the Famicom in 1990. Marth returned in a sequel to the game, Mystery of the Emblem for the Super Famicom in 1994. Both of these games were remade for the DS in the late 2000s--and with leading roles in four out of the fourteen Fire Emblem video games, Marth is the most recurring lead face of the franchise.
Marth is the prince of the Altea Kingdom. When the continent of Akaneia is taken over by the evil shadow dragon Medeus, Marth assembles a vast army to reclaim the kingdom, wielding the Falchion sword and the legendary Fire Emblem itself to do so. Marth is an archetypal knight in shining armour - selfless, humble, courageous, and putting the best interests of his kingdom and colleagues above all else.
The Fire Emblem series was famously confined exclusively to its home country of Japan for the better part of a decade. The franchise was first exposed to western audiences when ADV Films dubbed Mystery of the Emblem's 2-episode OVA adaptation into English. A few years later, Marth appeared as a playable fighter in Super Smash Bros. Melee, which greatly raised the series's overseas profile and inspired Nintendo to begin releasing the games worldwide. In Smash Bros, unlike other characters, Marth is noted for his Japanese dialogue being preserved and untouched even in international versions of the game.