Joining the battle from the storied Metroid series, Ridley's long tail and sharp claws let him unleash a torrent of devastating attacks. His Final Smash is a powerful stream of plasma breath intense enough to bring down Samus's starship.
Ridley is a newcomer fighter from the Metroid universe who makes his first playable appearance in Super Smash Bros. Ultimate. To date, he is the largest Smash Bros. fighter in Smash Bros. history to be an eligible fighter, although his size was reduced compared to his original appearance to fit with other fighters.
Neutral Attack: Swipes with his left claw, then with his right, then swings his head right to bite his opponent, the full combo dealing 8.5% damage. Alternatively, it can continue into a rapid jab where he continuously stabs his tail into the opponent dealing a minimum of 9.7% damage.
Forward Tilt: Grabs his tail and thrusts it into the foe. Can be angled. Deals 10% on tail sourspot, 13% on spear sweetspot.
Up Tilt: Swings his right wing upward. Ends quick enough to combo into itself. Deals 7% damage.
Down Tilt: Turns around and swings his tail along the ground. Deals 6% damage. 9% on sweetspot.
Dash Attack: Leans forward and quickly bites. Deals 12% damage.
Neutral aerial: Spins his entire body around similar to a backwards Charizard's N-air. Active for the majority of the animation. Deals 12% on tail tip, and 9% and 5% on his early and late leg hitboxes.
Forward aerial: Jabs his tail forward multiple times. Deals 5.9% damage for each jab for a maximum total of 17% damage on all sweetspots.
Back aerial: Does a backward roundhouse kick with his left leg. Deals 15% damage
Up aerial: Shrugs his wings upward while closed. Deals 14% damage on sweetspot, 10.2% on sourspots towards the centre of his wings.
Down aerial: A stall-then-fall stomp with both feet. Deals 14% damage on spike hitbox.
According to an interview with Sakurai, Ridley's down taunt is his favorite because it shows how big Ridley truly is.
After Ridley's Final Smash, Samus' destroyed Gunship can be seen crashing in the background.
During his reveal trailer, the method in which Ridley dispatches Mega Man is highly reminiscent of how the Alien Queen killed the android Bishop in the movie Aliens. The Metroid series is known for copying elements from the Alien film series, hence the reveal trailer doing the same.
Some of Ridley's palette swaps are references to either variations of the character, or other representations of him. In order, his red color references his appearance on the North American box art of Super Metroid, his dark blue color is a reference to Neo-Ridley, his green palette represents his appearance in Metroid: Zero Mission, the bright purple color swap is a reference to his original sprite in Metroid, while the golden color swap is a reference to the Golden Statues found in Super metroid, and his light grey Meta Ridley color swap is a reference to Robo-Ridley.
Ridley is the only male character from the Metroid series to be playable in Smash, and the only Metroid representative to not be a variation of Samus Aran.