Not A Bug Bug Report - Mechanics

[Goobing Fire]

What type of bug are you reporting? Mechanics

What is the bug?
Max speed weavile outsped by no item meowscarada (was previously custap)

Are you able to replicate it? If so, how?
https://replay.pokemonshowdown.com/gen9ou-2347853137

 

[DaWoblefet]

This OU battle had the mod "Tier Shift Mod" active, which affects a Pokemon's base stats. Meowscarada is UU, so it got +15 base stats, putting it faster than Weavile.