How to visually change a nickname

[A9ne]

I see a lot of people running around with fake nicknames, how do they do it?

[3rd]

show an example of what it looks like

[karizma4202]

Cheat Engine. just scan for your name and start changing results found.
best to do it right after starting the game. Some windows (like character sheet) need to be closed and reopened to see the change, might need to change worlds, and others will happen right away.

[A9ne]

I see a lot of people like that with the nickname Duck, and they're all different people.

[lilly0]

your mod is bug 🥀🥀🥀