Shin Akuma is a hidden character variant unlocked through a quirky input sequence: hold back+taunt, then mash down+taunt until Akuma pulls out his rice ball. Once you trigger it, you gain access to a powered-up version with expanded moveset options, including a double air fireball and additional super attacks. This discovery went largely under the radar until @b_HAUNT brought it to light—it's significant enough that IGN covered it separately. desk breaks down how to actually land this unlock and demonstrates what the enhanced Akuma can do with his new tools. If you're exploring everything the game has to offer or hunting for secret character forms, this is the kind of deep-cut tech that rewards experimental button inputs and persistence in the lab.
Hit back+taunt and then mash down+taunt until he gets out his rice ball then you unlock this version of Akuma (with a double air fireball and some new supers). I would never have found this but shoutout to @b_HAUNT who first let me know this was in the game. This is so big that there's an IGN video on it but if anyone knows who first found it, please post it in the comments.
From desk's YouTube channel
