once you get him to lvl 999 he can
Not for Lethe and Ike.
you cant
Ike is the main character from the GameCube version of Fire Emblem Path of Radiance.
The last Fire Emblem to come out was Fire Emblem: Shadow Dragon for (DS). Past US titles include... Fire Emblem (GBA), Fire Emblem: The Sacred Stones (GBA), Fire Emblem: Path of Radiance (GameCube) and now Fire Emblem: Shadow Dragon (DS). Fire Emblem: Path of Radiance is the prequel to Fire Emblem: Radiant Dawn and Fire Emblem (GBA) is the prequel to Fire Emblem: Shadow Dragon (DS). There are more Fire Emblem games in Japan, but no others have been translated.
you talk to him with Mist
Yep.
Path of Radiance and Radiant Dawn.
Radiant Dawn.
Its Nasir, a Goldoa dragon
16. He is indeed 16 in path of radiance, but older in radiant dawn.
No, they're dead.
At the end of chapter 16