
What I did was input a primary moveset, then quickly changed the value in medias res while a match was loading.
Anyway, when you perform any of the sidestep (SS) moves from the changed secondary moveset, whether to left or to right, random values will be inputtted, causing your fighter to glitch out, usually with hillarious results, or just "reset" him/herself with their intro most of the time with the glow on their hands, as if they have appeared briefly supercharged. The glitches may vary depending on what primary moveset you choose.
The parts when the game loaded and me changing the values were cut to shorten the length of the recording. Anyway, enjoy!
Timestamps:
0:16 Law with Lei's to Jin's Moves
3:39 Eddy with Yoshimitsu's to Jin's Moves
6:59 King with Ogre's to Yoshimitsu's Moves
8:29 Xiaoyu with the same combo in Tekken Ball Mode