Sans-Culotte

Sans-Culotte (or Sans-culottes) is a Super Special Move that made its debut in The King of Fighters 2003 alongside Ash himself. In KOF 2003 and KOF XI, it served as his Leader Desepration Move that could only be used if Ash is Team Leader while from KOF XIII onwards, it is now a Level 2 Super Special Move.

Description
Green flames shoot from the ground around Ash, causing him to glow green. This move allows Ventose, Nivose, and Germinal Caprice to come out instantly without charging for a short period of time.

Starting from KOF XI, this also makes all versions of Ash's Floreal command normal Special Cancelable, while the aforementioned Special Moves in turn could also be canceled back into Floreal.

KOF 2003
As it is Ash's Leader Super Special Move, this requires two bars to use as opposed to one. Unfortunately, however, this is one of the few weaknesses that Ash has in his otherwise strong debut appearance due to the move not having anything other than its damage output and stellar vertical range, allowing it to be used as a very effective anti-air. As such, don't expect to be using this all too often, if at all.

KOF XI
Unlike its debut appearance, here, the move is much more viable to use not only due to removing the charge time on Ash's Special Moves, but it also adds in a new move in Germinal, which grants Ash the ability to seal the opponent's Special and Desperation Moves for a few seconds, much like Chizuru before him.

KOF XIII
The bread and butter of Ash's (in)famous combo game, this is not only still the effective anti-air that it was prior, but now the combo potential - especially when paired with the Drive Cancel system - is now through the roof, letting Ash do some of the longest, craziest, and most difficult combos in all of KOF XIII.

Unfortunately, however, the price he pays for such flashiness is the impracticality of it all. While it's nice that the charge time on Ash's Special Moves is virtually non-existent, all of the combo potential that Ash gets from this move is quite impractical compared to his bread-and-butter combos, especially in the online environment of KOF XIII. All of that and the move costs two whole bars to use, just as much as most other Level 2 Desperation Attacks in the game.

KOF XV
This time around, thanks to the increased input leniency and rollback netcode, it's much more viable and practical to go for all of those flashy combos and still have the added benefits of removed charge times on Ash's Special Moves and reap the rewards of cheaper EX moves in the process compared to KOF XIII.

Just like in prior games, however, this move still costs two bars to use and has the shortest duration of any of its appearances thus far.