Editing Arcfire

Upon use, Robin yells "Arcfire!" and produces a ball of [[flame|fire]] above his head, which then travels diagonally downward. If the flame makes contact with a surface or an opponent, it bursts into a pillar of fire; if it does not hit anything shortly after release, it disappears harmlessly. Similar to Ness' [[PK Fire]], The move traps opponents in a multiple hitting flame which inflicts a total of 10%{{GameIcon|SSB4}}/15%{{GameIcon|SSBU}} damage. Unlike PK Fire, the flame pillar of Arcfire launches away on its final hit and activates even if it hits a shielding opponent. Arcfire's final hit has KO potential at very high percents, KOing at 200%. This move sets Robin's active tome to Fire.

Arcfire has limited uses at point blank range, as the fireball may go over the opponent's head. It is better used at medium ranges as an option to stop approaches. It is especially useful when used to stop short hopping opponents, as they will likely jump straight into the fireball while Robin is launching it. It can also be used as protection when charging up {{b|Thunder|Robin}} or before recovering offstage to prevent opponents from camping beside the ledge. The projectile is a great combo starter, as opponents trapped in Arcfire on the ground can be grabbed if they decide to shield and the player is fast enough, while the final hit places opponents at the right height for an aerial attack. If one is quick and accurate enough, the move can combo into [[Thunder (Robin)|Thoron]] for a powerful finisher as well, as opponents will be trapped in hitstun after Arcfire's final hit and will usually be unable to dodge the beam of lightning. With precise positioning and timing, Arcfire can even combo into itself, quickly racking up damage that can lead to a quick KO.

After a maximum of 6 uses, the durability of the Arcfire tome runs out and the tome will be discarded. After a cooldown of 12 seconds, the Arcfire tome will be restored. Attempting to use Arcfire during the cooldown period will result in Robin going through the motions of the casting animation, but failing to produce an attack.

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The pose that Robin makes when casting Arcfire in ''Smash'' is taken from the three Game Boy Advance ''Fire Emblem'' games - ''{{s|fireemblemwiki|Fire Emblem: The Binding Blade}}'', ''{{iw|fireemblemwiki|Fire Emblem: The Blazing Blade}}'', and ''{{s|fireemblemwiki|Fire Emblem: The Sacred Stones}}''. In these games, members of the {{s|fireemblemwiki|Mage}} class cross their arms in front of themselves when they attack with anima spells. ''Fire Emblem Heroes'' later depicted male Robin striking a similar pose when attacking in his basic, tome-wielding "High Deliverer" incarnation.  Additionally, the two regular fire spells in the Game Boy Advance games - Fire and Elfire - show a small fireball forming over the caster before it flies to explode on the foe, and the starting arc of Arcfire in ''Smash'' is similar to this.

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