The bulk update request #10173 is pending approval.

mass update kiggy -> muki_(mukihyena)
mass update dream_demon_kiggy -> dream_demon_muki_(mukihyena)

Reason: I've changed the name of the character "Kiggy" to "Muki"

This applies to "Dream Demon Kiggy" as well

mukihyena said:
Reason: I've changed the name of the character "Kiggy" to "Muki"

This applies to "Dream Demon Kiggy" as well

An alias would be a better option than a mass update.
Aliases remove the old character tag from circulation while mass updates leave it still taggable in the future.