Not in vanilla Cobblemon. Needs the AllTheMons datapack (or my Cobblemon Survival Guide modpack, which includes it). Same in AllTheMons x Mega Showdown.
Best Spawn Conditions
AllTheMons datapack
Rarity
ultra-rare
Biomes
Floral
Weight
2.00
Level range
50 – 50
Time
any
Weather
any
Context
grounded
EV yield
1 Special Attack, 1 Special Defense, 1 Speed
Best Poke Snack Berry(s)
Hondew, Grepa, Tamato
Can see sky
true
Presets
Natural, Wild
Properties
Has at least 3 perfect IVs
Spawn multipliers
2x if during the day