What does the clutch button do?

[RobertsGonzalez]

I really don't know

[Professorn]

The clutch reverses the characters momentum during some areal moves as you charge them up in the air! It does advanced stuff!

[XZero]

It also forces dashing instead of walking... prevents fast fall from happening when you press down far enough... makes Business Casual Man's "sell attacks" not be sell attacks when he has enough money for them to be powered up...

[Bingus]

Really? Thanks for the extra info, XZero. Damn, that will take some working into muscle memory!

[XZero]

Originally posted by Gea:

Really? Thanks for the extra info, XZero. Damn, that will take some working into muscle memory!

Right... Even ignoring the things you don't have to use it for, it does sound a bit complicated to do all these things.

...Oh, I see I forgot some things it does.
Here's where I found that info:
https://steamcommunity.com/gid/103582791461604468/announcements/detail/1652137515764137296

-Renamed the Dash button to "Clutch", due to it's variety of non-dash uses

-Previously undocumented usage of the clutch button here explained:
--Hold clutch to force lightshield
--Hold clutch to suppress fastfall
-Characters can now walljump from holding edge by pressing clutch
-Characters can now extend moonwalks once per moonwalk by pressing clutch
-Characters can now tech and Dash-Cancel with Clutch
-Introduced momentum reversal on selected moves; during any of these moves, press the clutch button to flip character and horizontal velocity

-Clutch button press is indicated by option symbol on the left side of player arrow

Business Casual Man
-Fair, Ustrong, Fstrong and Fthrow will no longer act as Sell moves if you hold the Clutch button, even if you can afford them

Those patch notes also list which moves can have their momentum reversed.
It's only Specials and Air Strong moves, but not all of them.

...And Business Casual Man has one more sell move, his Air Strong, which will always be the sell version when usable (at $1000, maximum money).