Nightmare Geese (ナイトメア・ギース) is the nightmare manifestation of Geese Howard in the games where he is canonically considered dead. The Fatal Fury series did not give this version of Geese any character renaming. "Nightmare Geese" was originally a name coined by fans since the word "Nightmare" appears instead of "Round 1" in Real Bout Fatal Special before fighting Geese; SNK then canonized it in KOF: Maximum Impact 2.
The Fatal Fury series gives two different origins for the phantom: he may only haunt people's dreams or he may be an illusion cast by the Jin scrolls. It's implied that the latter appears as a normal Geese in Real Bout Fatal Fury 2: The Newcomers; he leaves his legacy in Billy's care before disappearing from existence.
The King of Fighters XIV has him be a DLC costume for Geese; wearing this costume also distorts his voice.
- Gather Chi: Geese can gather chi energy from Gaia, the mother-earth.
- Sense: Geese can sense the presence of people nearby.
- Energy Projectile: Geese can fire a wave of energy called Reppuuken and even fire two of them at the same time (Double Reppuuken). The air version is called Shippuuken (for one shot) and Double Shippuuken (for two shots).
- Energy Attack: Geese can infuse his normal attacks (punches, kicks, etc.) with chi energy to cause more damage.
- Cutting Energy: Geese can create blades of energy as seen in his Hishou Nchirin Zan move.
- Energy Geyser: By touching the ground with his hands, Geese can make a geyser of energy come from below the ground. He called this attack Raising Storm or Raging Storm.
- Summon Thunder: Geese can summon lightning from the sky. He uses this in his Atemi Nage and Thunder Break moves.
- Create Fire: Via his Onisatsu: Fudou Ken (Oni Killer: Motionless Fist) technique in the Maximum Impact games, Geese can cause fire to emerge from his body in a short burst, allowing him to strike at his opponent afterward.
Geese's fighting style remains generally unchanged, but this version is more powerful and faster than the normal Geese. He has an aura of chi energy around his feet that stays active mainly in his idle stance.
Notable differences include the inclusion of his Double Shippuuken (Double Hurricane Fist), which was infamous for both absorbing projectiles and hitting overhead (or low when near the opponent's feet), the Reppuuken becoming being a tall crescent wave and his Double Reppuuken being a tall projectile that is notably difficult to short-hop over, while his Ja'ieken was known for being covered in flames while having Geese face the background instead of the foreground. This version also was the first user of the "claw"-variation of the Raging Storm, as well as having an exclusive counter-throw technique known as the Ura Kumo Kakushi (Reverse Cloud Covering), a technique were Geese blocks his foe's attack and shoves them aside to open them up to further attacks.
While balanced in Maximum Impact 2 and Regulation A more akin towards his normal-self's attributes, Nightmare Geese was notably overpowered in both his debut and in KOF 2002: UM. In the latter game, his HSDM/MAXDM is a combination of two techniques that debuted in Wild Ambition, the Raging Dead End (a counter-technique that involved powering up his hands with an aura) and the Kokuu Reppuuzan (Empty Air Gale Slash; a rapid succession of Reppuuken ending with a double palm blast). When Geese activates his Raging Dead End, he reverts to a modified version of his stance from KOF '96.
Ironically, via his Real Bout appearance, Geese's moveset while still a bit reminiscent with traits that his Nightmare form shares, is notably watered down due to a number of his signature specials being removed, despiting having new ones being added. This form is more re-balanced as EX Geese in '98: Ultimate Match via re-adding most of his attacks while still having differences between him and his other normal self. Nightmare Geese in both of these appearances however, did not have his signature chi aura around his feet.
Oddly enough, his SvC Chaos and vanilla 2002 versions are examples of Geese being a combination of both his normal-self and Nightmare-self via the taller Reppuuken projectiles (though the arm motions used are more akin to '96) and the claw-version Raging Storm while also lacking the aura.
KOF 2002: UM retains his unlockable move from Dominated Mind known as the Ashura Shippuuken (Asura Hurricane Fist), a DM version of Shippuuken where he dashes forward with a Ja'eiken to floor his opponent, then bombards them with a barrage of blazing Shippuuken.
Akin to his normal self, Nightmare Geese also possesses a unique version of the Raging Storm that is done under specific circumstances; in Nightmare Geese's case, the SDM version of the attack in 2002 UM references the stronger version that can be done after a unique combination of attacks that would stun the opponent upon the final hit, turning his Raging Storm into a red version. This version first debuted for normal Geese in Fatal Fury 3.
- Geese ni Shoyu (Soy Sauce for Geese) - Real Bout Fatal Fury Special, The King of Fighters '98: Ultimate Match (as EX Geese) (both arranged versions in E Minor), The King of Fighters XIV (as Terry's opponent)
- Geese ni Mustard (Mustard for Geese) - The King of Fighters 2002: Unlimited Match
- Kiss Geese Once More - While never used explicitly for Geese, this theme is used in the "Infernal Gate" stage of both KOF: Maximum Impact and Maximum Impact 2. The stage is modeled after Geese's "throne room" from the original Fatal Fury.
- Soy Sauce for Koyadofu - The King of Fighters XIV
- Real Bout Fatal Fury Special - hidden boss
- KOF: Maximum Impact 2 - unlockable
- KOF Maximum Impact Regulation A
- The King of Fighters 98: Ultimate Match - as EX Geese
- The King of Fighters 2002: Unlimited Match - as EX Geese
- The King of Fighters XIV - as a pre-order/DLC costume for Geese