The YOMI Hustle ARG?

Please, please help me. So I recently found out about a hidden character in the game's files, called Alien, with only the base sprite and no code attached. I tried asking around I'm the discord, and they claimed that it was a real character that already came out, but had to be unlocked through an ARG at ivysly.com

People said to took them several days to figure it out, but it was worth it. Can anyone help me with it? Is it even real in the first place, or are they just gaslighting me?

Please don't make fun of me for being stupid.