Crossplay

Is Fire Emblem: Ankoku Ryuu to Hikari no Tsurugi crossplay?

Crossplay does not apply to Fire Emblem: Ankoku Ryuu to Hikari no Tsurugi: it has no online multiplayer.

Fire Emblem: The Dark Dragon and Sword of Light is the first game in the Fire Emblem series, developed by Intelligent Systems and published by Nintendo. It was first released on the Famicom (known internationally as the Nintendo Entertainment System) on April 20, 1990. It takes place on the continent of Archanea. It stars Marth, a character who later appeared in Super Smash Bros. Melee. The first time the game was released outside of Japan was in the form of a limited edition port for Nintendo Switch, under the same name, that runs a localization script in the background, but the original version of the game was never released outside of Japan.