Super Smash Bros. Ultimate

Super Smash Bros. Ultimate is the sixth installment of the Super Smash Bros. series.

Development
Development of Super Smash Bros. Ultimate began shortly after the end of Super Smash Bros. for Nintendo 3DS and Wii U's development. Trademarks for the game were filed on November 12th, 2017.

The game was first announced on March 8th, 2018 during a Nintendo Direct, first revealing the Inklings from Splatoon and featuring silhouettes of several Nintendo characters. No formal title nor release date was revealed at the time.

During the Nintendo E3 2018 direct, the sixth installment of the Smash series was fully announced under the title Super Smash Bros. Ultimate with a worldwide release date of December 7th, 2018. It is stated that Smash director Masahiro Sakurai pitched the idea for Ultimate with the intention of including every single fighter that has ever appeared in the series, even those who appeared in only one game. While considered an ambitious idea, especially since obtaining the licensing for the third-party combatants would be particularly difficult, Sakurai's vision for the game would come to pass with the base game currently boasting a total of all 68 individual characters that have ever made appearances in the Smash series.

The Fire Emblem franchise is currently represented by seven characters. They are Marth, Roy, Ike, Robin, Chrom, Lucina, and Corrin.

Marth
Marth was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. While he retains his appearance from Super Smash Bros. for Nintendo 3DS and Wii U, he is now voiced in English for the first time in Smash, voiced by Yuri Lowenthal. Hikaru Midorikawa reprises his role as Marth's Japanese voice actor.

Roy
Roy was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. Unlike in Smash 4 where he was a DLC character, Roy is included in the base game.

Ike
Ike was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. He returns with both his Fire Emblem: Path of Radiance Ranger outfit used in Super Smash Bros. Brawl and his Fire Emblem: Radiant Dawn Hero outfit used in ''Super Smash Bros. for Nintendo 3DS and Wii U. '' Unlike the previous entries, Ike is now an unlockable character rather than being available from the start. Ike's voice has also been updated, now being played by Greg Chun in the English version, replacing Jason Adkins who has voiced Ike in the Smash series since Brawl.

Robin
Robin was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. Both genders of Robin make a return with a slight update. Now, Robin's Weapon Durability for their Tomes and Levin Sword are fully displayed on their health gauges. David Vincent and Lauren Landa reprise their roles as Male and Female Robin respectively.

Lucina
Lucina was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. While a separate character from Marth, she is considered to be Marth's Echo Fighter, a character whose moveset is heavily based on another character, but has some differences to make them a little more distinct.

Corrin
Corrin was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018. Both genders of Corrin make a return and are included in the base game, unlike Smash 4 where they were DLC. Cam Clarke and Marcella Lentz-Pope reprise their roles as Male and Female Corrin respectively.

Chrom
Chrom was revealed during the Super Smash Bros. Direct on August 8th, 2018. He is considered mainly an Echo Fighter of Roy, sharing the same normal moves and special moves, though he has Aether as his up special like Ike.

Lyndis
Lyndis was revealed during the Nintendo Direct at E3 2018 on June 12th, 2018 as an Assist Trophy once more.

Castle Siege
Castle Siege from Super Smash Bros. Brawl is confirmed to return in Ultimate.

Arena Ferox
Arena Ferox from Super Smash Bros. for Nintendo 3DS is confirmed to return in Ultimate.

The Colosseum
The Colosseum from Super Smash Bros. for Wii U is confirmed to return in Ultimate.

Original Songs
The following songs are direct from a Fire Emblem series title. The Devoted is the attack theme of the Greil Mercenaries in Fire Emblem: Radiant Dawn. Ike's Theme, known as Eternal Bond in Fire Emblem: Radiant Dawn. This theme is used for Ike's character trailer.
 * The Devoted
 * Ike's Theme (Eternal Bond)

Remixed Song
The following songs are remixed versions of original Fire Emblem tracks made specifically for the Smash Series The Brawl vocal rendition of the Fire Emblem Theme. This theme is used for Marth's character trailer. A new arangement of the map theme for the initial chapters of Fire Emblem: The Binding Blade. This theme is used for Roy's character trailer. A new arrangement of the theme of the Endgame of Fire Emblem Awakening. This theme is used for Robin's character trailer. A new arrangement of the battle theme for the Prologue chapter of Fire Emblem Awakening. This theme is used for Lucina's character trailer. A new instrumental version of the main theme of Fire Emblem Fates. This theme is used for Corrin's character trailer.
 * Fire Emblem Theme
 * Beyond the Distant Skies
 * Id (Purpose)
 * Prelude (Ablaze)
 * Lost in Thoughts All Alone