Chi Yu Evolution

[sleek patrol]

Ik for a fact none of the Ruin Pokemon can evolve, but apparently, Missingno Evolves into Chi Yu

[old oracle]

Chi-yu

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Abilities: Beads-of-ruin
Types: ,
Egg Groups: :undiscovered: Undiscovered
Weight: 1.0 kg
Gender Ratio: 87.5% Male, 12.5% Female
Catch rate: 45
Stats
HP: 55
Attack: 80
Defense: 80
Special Attack: 135
Special Defense: 120
Speed: 100
Available Forms:
None
Evolution Line:
➥├─Missingno
➥├─Chi-yu

Evolve to any of the forms by using /form (form name) - Upvote MewBot

[warped sable]

It doesnt.
Old visual bug. Most of gen9 said that.