When I was younger, I was a huge sonic fan. Naturally, as a child I was cringy. I remember seeing a fan animation where Sonic and Shadow fused to make "Shadic" then they went super, thus "SuperShadic" but i also liked the number 1,000,000, which resulted in this name. I stuck with it for a long time despite it being cringy. Then one day I played a Pokemon MMO, It wouldn't allow me to use this username, so I used a random username generator, it gave ZeroBlazeExpert. I changed it up to ZeroFadedBlaze, so most of my modern accounts use that username, or ZeroFade.
I know this is long, but I mostly use PK_Mixtape now. I combined my love for the mother series, with modern rap culture. At first I thought it was amazing and original...It's not. But I kinda like it, so I'll probably stick with it until I find a more creative username.
I also use Quote_Da_Man sometimes...But this is too long... I like cave story and wanted a username around it.
EDIT: I've gone through billions of users i guess cuz now i either use SegaSanshiro or SomeCallMeJah