|Long-awaited powerful melee weapon. Extremely stylish too!|
The weapon consists on a short fire pillar that is projected from the user's arm cannon that acts as a sword. The Flame Sword can be drawn on the ground, in the air, or on ladders. If drawn on the ground or on a ladder the user will stay stationary, however if it is drawn in the air the user can still freely move left and right. Because the weapon acts like a sword, it has a somewhat short but broad range, which is enough to attack floor targets that the frontal buster shot normally cannot, like Spine or Crunchran, or can also destroy a big quantity of weak enemies that are too close to the player character. When used, this weapon does constant damage on its targets when it is in contact. However, badly used, this weapon can leave the player character prone to receive damage, so the player needs to know when to use it.
Like the Sega Saturn port of Mega Man 8, the Flame Sword is the only weapon that can attack Wood Man while he is using his Leaf Shield, although it does not burn his Leaf Shield and it does not work on other bosses using a shield.
- Because Flame Sword comes from the 32-Bit game Mega Man 8, it lacks official 8-Bit sprites. As a result, custom sprites were designed initially by Aze, and then Zedicon did the final version.
- When Proto Man uses the Flame Sword, a reflective glare will move across his visor with the sword. This is a unique animation detail for Proto Man.
- Being a sword-like weapon, the Flame Sword is similar in appearance and function to Zero's Z-Saber from the Mega Man X and Mega Man Zero series. Unlike the Z-Saber however, the Flame Sword cannot be used in quick succession while the user is grounded.
- In the sneak peek confirming its upcoming appearance, Mega Man ignited Oil while fighting Tellys with the Flame Sword, so he failed to reach a nearby Energy Element. This makes Flame Sword's showcase the first Showcase to show the player character fail beating the level that was built to showcase it.
- If the Player Character activates Flame Sword while in the air but lands before the attack animation is finished, they will switch into their grounded version of the attack abruptly. Because the grounded attack has the user preforming an upward slash, and the airborne version has the user preform a downward slash, this makes it looks like the Player Character is suddenly stopping mid-way into a slash and reversing direction. Although very minor animation quirk, with proper timing this can allow for a single attack to damage an enemy or Boss twice as the blade's hitbox now covers the same area twice.
- Flame Sword on rare occasion can crash the game if it is used to defeat a Boss that subsequently gives the user a new weapon upon their defeat. This is likely due to Flame Sword having very unique sprites for its animations and the game for whatever reason fails to cancel the animation before switching to the new weapon like it normally does, and thus subsequently fails to call upon the same sprites when the Player Character is forcibly switched to the new weapon. Its occurrence may have to do with dealing the fatal blow to the Boss on the first few frames of the Flame Sword animation, however it is not absolutely certain this is the case as the glitch is very rare and hard to recreate intentionally.