Fire Emblem: The Sacred Stones

The third GBA Fire Emblem game, but only the second to escape Japan.

NPC with Stats
Dara, Saleh's grandmother, has stats as a (male!) Druid and a rather nifty profile description: "An old woman of Caer Pelyn. Over 100 years in age, she is a font of wisdom."

Referenced Only
Nate was a Wyvern Rider whose role was replaced by Cormag (who originally had Joshua's role as a coin-flipping Mercenary). He is playable in the prototype version, with the placeholder "?" mugshot.

Demi appears amongst generic boss names. Mehve, Loewe and Mulitia are unused names in the prototype version, appearing at the very end of the character names list.

Items
Alacalibur (also known as Aircalibur) mysteriously features in this game despite not featuring since Sword of Seals (FE6). The spell animation works fine, but the music cuts dramatically whenever it's used. Also, it has a Killer Ballista icon...

Other unused items include a dummied Mani Katti, Forblaze, Luce, Earth Seal, Mine and all of Ninian's dancer Rings from Blazing Sword, aka Fire Emblem in US/EU. All of the dummied weapons have the name "Dummy" in the English version.
 * The Earth Seal works normally (probably has the same effect as the Master Seal), as do the dancer Rings and the Mine.
 * Forblaze and Luce don't have spell animations.
 * Mani Katti cannot be used by anyone (normally).

Bizarrely, the Nightmare "staff" used by the Demon King has an unused stat bonus of +5 Defense and +5 Resistance. This stat bonus cannot be seen normally because staves can't be equipped, so maybe Nightmare was originally going to be an item type that could be equipped?