One-hit KO

A one-hit KO (or abbv. OHKO) is an attack in all three Super Smash Bros. with such high base knockback, that it KOs at 0%. However, almost all of the so-called OHKOs are highly conditional; they all share the following restrictions:

• The opponent does not tech, DI, momentum cancel, and/or crouch cancel.
• There is no wall to absorb the knockback.
• Knockback may be insufficient to KO at 0% on very large stages (e.g. Hyrule Temple, New Pork City, 75m.).
• Knockback may be insufficient to KO at 0% if the attack had been landed previously (due to Stale-Move Negation).
• Knockback may be insufficient to KO heavy characters at 0%.
• The opponent is not giant and/or metal.
• The damage ratio is on 1.0 and no handicaps.

The typical rule of one-hit KO's is being able to KO the majority of characters from the center of Final Destination at 0%.

Examples

• Roy's almost fully or fully charged Flare Blade.
• Mr. Game & Watch's fully charged Oil Panic after absorbing three strong enough projectiles (Such as three PK Flashes).
• Ike's stage 8 Eruption.
• Roy, Ike, or Marth (SSBB only) countering a damaging enough hitbox (much more likely to be an OHKO with Roy).
• Marth's Critical Hit.
• Beast Ganon (If the final hitbox hits).
• Puff Up, depending on stage size (more likely to be OHKO on smaller stage if the opponent is close to its body).
• Wario-Man's fully charged Wario Waft.
• Lucario's Aura Storm when it's at full power (182% damage).
• Getting hit by a walking Bob-omb after being reflected by Fox's reflector in SSB.
• A side smash with the Home-Run Bat.
• Lugia's Aero Blast (only in Melee).
• Touching Moltres in both Melee and Brawl OHKOs.
• Suicune's Aurora Beam.
• Deoxys's Hyper Beam (after the blast gets slightly narrower).
• When smash thrown, Electrode's explosion is strong enough to OHKO even Bowser (King Dedede can survive at 0% however) (SSBB only).
• The Dragoon.
• If Wario is striking a buried Pitfall while riding on his Wario Bike, he will be sent flying for an OHKO.
• If a Hothead is hit by a fire-based attack that does over 30% (such as Ike's stage 7, 8, and fully charged eruption) while it is uncharged, it will OHKO when smash thrown. Any sparks it gives off while traversing the stage at this strength will also OHKO.
• If a Soccer Ball is launched at enough speed, such being hit by an extremely powerful attack such as the Home-Run Bat or Marth's Critical Hit or being launched after sustaining enough damage, it will OHKO anyone it slams into.
• Banzai Bill's explosion on Peach's Castle.
• Corneria's cannon laser shots.
• Touching the hull of the Pirate Ship.
• The Ultimate Chimera's bite.
• The first spike on Rumble Falls (can easily be teched).
• Getting crushed in the Subspace Emissary.
• Tabuu's Off Waves (on Normal or higher difficulties in SSE) (Very Hard and Intense in Boss Battle Mode).
• Tabuu's Golden Bracket attack on Intense difficulty in the SSE.
• Galleom's attack when he stiffens and tries to fall on the player on Intense difficulty in the SSE.

Trivia

• The smash attack with the Home-Run Bat is the only attack to be an OHKO in all three installments of Super Smash Bros..