I will tell you about all my names
My first online name was Hollyboy10: The name of my dog, my gender then the age I made that account.
The name I use right now is Crosstails20: Reference to the anime Akame ga Kill where this green haired guy uses a weapon called Crosstails, but then died on episode 20. This is also the name where I entered my first actual smash tournament where I used the tag CROSS, as a simplified version of my full name. Now I use a combo of tags Cross, Tails, CT20 and Crosstails20 each with different controls. Cross is the tag with bidou controls, Tails is the one with smash stick, CT20 is the one is the one with special stick and Crosstails20 is the one with attack stick
And in the future I may change my name to Gear Rat: This is a play on my Real Name and is somewhat a reference to my personality where when I get something going I am letting those gears in my mind turn.