Here are all of the Pokemon that are UU and below with over 2.5 usage in Ubers (this is from the 1630 stats):
Blissey (NU): 2.95% Masquerain (PU): 3.16% Ditto (NU): 3.40% Grimmsnarl (NUBL): 4.16% Iron Treads (UU): 8.12% Basculegion (RU): 15.95% Skeledirge (UU): 19.12%
Source: Gen 9 Ubers 1630 Stats
