Beast Ganon tears sideways across the stage, does 10% on transformation and 47% on dash
Beast Ganon is Ganondorf's Final Smash. Ganondorf turns into Ganon, a gigantic beast resembling a fearsome boar, then stomps. If caught in the transformation hitbox, the opponent receives 10% damage and gets buried. The stomp does little damage, but it stuns the opponent, even if they're in midair. Ganon then does a dash across the stage that does 47% damage. The move, if the dash hits, is in nearly every situation a One-Hit KO, but if he hits all three opponents at once, only one who is heavy will not be KO'd. Soon after transforming, Ganondorf returns to his normal form, and appears back at the spot in which he used it. The player can't self-destruct with this move, unless he/she was doomed to die before using it (i.e. if Ganondorf uses this move on a falling block, even if it has not begun to fall yet). If the player uses this move, they should try to be at the boundary line of the screen. If he/she starts in the middle, opponents can get behind the player, and they will avoid being hit.
Ganondorf's Final Smash. When he grabs a Smash Ball, he transforms into a repulsive, evil beast. He'll vanish momentarily from the screen, then rampage from one side to the other in a straight, headlong rush. When he begins the move, any character before his eyes will flinch, so try to start the move near other characters.
Ganon is the penultimate form of Ganondorf, which debuted in the original Legend Of Zelda game on the NES and has appeared in almost every Zelda title since in some way, shape, or form. Ganon is traditionally a large, half-human/half-boar in all of the games he appears in. However, the Ganon used in Brawl, like Ganondorf himself, is based on his appearance in The Legend Of Zelda: Twilight Princess and even has the same glowing wound. This version was completely beast-like, and Ganon's main attack in Twilight Princess was charging at Link.
Although Ganon has the same glowing wound as in The Legend of Zelda: Twilight Princess, it has a purple tint around it, rather than just being white, like in "Twilight Princess".
While Ganon has the glowing wound from The Legend of Zelda: Twilight Princess, Ganondorf does not.
If the player who is Ganondorf pauses while Beast Ganon is dashing across the screen, the camera automatically focuses where they were standing when they activated the Final Smash. This could mean that, programming-wise, Ganondorf himself does not actually move, but is animated to disappear and reappear at certain points while the separate Beast Ganon model moves and attacks.
If used on the edge of a stage with an opponent below you, it can be used as an effective spike (because of the fact that it buries).
If the player pauses just as Ganondorf returns from the attack, he will be in his default character model pose.
Alternately, if the player pauses just as Ganondorf begins the attack (before he transforms), he'll/she'll be able to spot a very tiny Beast Ganon near his neck. If he's bending down, it'll be more noticeable, and inside his cape.
The move's special effects can reveal very odd raytracing if looked at from the proper angles with the pause camera. At certain angles, a character can appear to be looking in a distorted mirror.
Ganondorf's Final Smash was revealed before the actual character himself.