I wrote up this guide in case anyone stumbles across this thread later and needs it.
1.
Buy this adapter. - $16.00
2. There are six switches on the back, when you get it, flip the 4th switch. (The 1st in the 2nd group of 3.)
If you don't flip the switch, It will work fine, but you can't use it in local multiplayer. Every time you press "up", it will assign itself to the other profile.
3. Have the PS4 on and MKX already running.
4. Plug the PS2 pad into the adapter and the adapter into the PS4.
5. You'll get a message saying you can't use wireless PS3 controllers, ignore it. Shortly after, you'll get a pop up saying you've connected a legacy controller and it is assigned to your profile. Press X on the DS4.
6. Press "Analog" on the PS2 pad if it isn't already lit up.
You should now be able to use the directional buttons with no problem, but the action buttons will be switched. (Circle=X, Square=Circle, X=Square, Triangle is unchanged.)
7. Use the DS4 to navigate to your wireless presets and edit the new preset using your PS2 pad to put the correct buttons where they should be.
And you're done.
----
Tips:
1. Do not try to navigate the menus using the PS2 controller. You will make a mistake and accidentally log out of WBID, or back out of character select on accident. Just use the DS4 to make all decisions until you have selected your character and variation, then pick up the PS2 pad and play.
2. If you happen to be player 2, you can hit the Home button on the Adapter to switch profiles to yours.
3. Options is now Start and the Touchpad is Select, so you can still reset in Practice and toggle theater view in KOTH.
@zaf
@Pig Of The Hut
@WidowPuppy
@AK XEN0M0RPH
@buyacushun
@chemist4hire
@JRosa21
@sub_on_dubs
@Anyone Else
Just tagging people that were in this thread previously. If you know of anyone else interested please tag them as well.
If you test this yourself, please report back with your findings!