=Dev= Bugfix week! only mentioned damage from Prismatic Burn was updated to be considered Burn type, but it doesn't make explicit whether it is still a separate status condition from Burn in cleanses.
Wicked King's Burn is 9999 turns, its power is too high to be cleansed unless the cleanse mechanic assumes 10 turns max similar to how Status conditions eater equipment remain balanced in combination with Token Package's Champion FSB skill's power being distributed by an assumed 10 turns, but is programmed to an arbitrary 9999 turns.