Flare Blade (エクスプロージョン, Explosion) is Roy's neutral special move, derived from the Melee iteration of Marth's Shield Breaker. It is known for being one of the few moves capable of dealing a one-hit KO in the Smash Bros. series.
Roy swings the Sword of Seals up and over his head, then slams it into the ground in front of him with a flame effect.
Flare Blade shares the same arcing animation to Marth's Shield Breaker. However, Flare Blade can be charged significantly longer, which deals more damage and knockback. The overhead slash will only produce a damaging explosion if the attack connects with an opponent or the move is charged all the way, which hinders its hitbox.
Flare Blade can be charged for up to five seconds by holding the special button, growing stronger the longer Roy holds it in position, and it can be launched at any time during the charge. The move will be automatically launched if charged for the full five seconds. A fully charged Flare Blade inflicts an explosion that deals 50% damage and devastating knockback, enough to one-hit KO all characters on any normal-sized stage (on large and/or irregular stages such as Temple, the move may not instantly KO), thus making a fully charged Flare Blade easily both the highest-damaging and farthest-launching neutral special in Melee.
Roy suffers 10% in recoil damage from the use of a fully charged Flare Blade, regardless of whether it hits a target or not.
The move retains its original arcing animation from Melee whereas Marth's Shield Breaker has been changed to a thrust. It also retains its chargeability, although it now produces a damaging explosion hitbox regardless of what stage it has charged to, which increases in size as Roy charges the move, escalating from a small explosion to a huge fiery blast.
It has increased startup as a tradeoff for the larger hitbox, as well as an animation where Roy lifts his sword along his left before retuning to neutral position; this part of the attack can be interrupted very soon, making the move very difficult to punish especially when spaced properly.
Fully charged, the move is still capable of OHKO-ing, although each stage of the move now deals much more knockback and able to KO at low percents if charged up slightly: a second of charging is enough to KO middleweights at the sides of the stage at 95%, and a three-second charge is able to KO at 45% in the middle of the stage, making a connected Flare Blade an incredibly strong move that is useful for punishing bad ledge get-up options.
Special Move customization was added in Super Smash Bros. 4. These are the variations:
Like the other DLC characters, Roy lacks custom move variations.
In Fire Emblem: The Binding Blade, the titular Binding Blade wielded by Roy is capable of channeling fire when Roy attacks from afar or scores a critical hit. Roy's movements and sword arc when using Flare Blade are also based on his critical while wielding the Binding Blade.
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