Players have known about it for years, but until recently it was considered to be inaccessible without tampering with the game. That is until Crystal_Cube99 posted another video to Twitter just last week (as spotted by @gosokkyu) showing them doing exactly that.
In the video, they appear to use a bug to get Chun-Li and Alex onto Gill's stage. They then take advantage of another glitch to get Chun-Li at an unnaturally high point in the level and stomp. This causes Chun-Li to levitate up through the level, where the background will eventually scroll away to reveal Doraemon. This method works on the arcade PCB and the Street Fighter 30th Anniversary Collection.
In case you're unfamiliar with the character, Doraemon is a robot cat from the 22nd century who first made an appearance in the manga series written and illustrated by Fujiko Fujio. This manga has been adapted into an anime on three separate occasions, in 1973, 1979, and 2005, with the character becoming beloved by several generations as a result. Besides Street Fighter, they have appeared in several video games over the years, including the farming sim Doraemon Story of Seasons.
It's honestly remarkable that Crystal_Cube99 was able to find this method. We can't imagine how much experimentation went into testing this theory. We'll be keeping an eye on their YouTube for when they eventually drop the full video with their explanation of this discovery, and you definitely should too.
What do you think of this discovery? Let us know in the comments