April fools 2023 event was focused mainly on Stan and NERDS
It added Stanlium, stanley s, stansword, NERD goggles.
The April Fools 2023 update was a joke update that happened on ?, ?, PM EST and ended on April ?, 2023, AM EST. Most notably, the update added stanleys, and it added nerd goggles that allow you to get badge.
Official Changelog
# Patch Notes 2023-?-? > Additions
Actual Changes
Stanley
The update added a new nps called stanley. When they spawn they go to nearest player to kill him using stansword.
Nerd goggles
Nerd goggles add badge to player inventory.
Stansword
Stan sword is strong weapon that used by stanley.
Players abused it in test place so devs deleted it.