Meta Knight soul destruction.

[The_real_cal_howard]

"Armor that once belonged to one who schemed to rule the Mirror World. It is said his soul shattered at the flash of a blade."

— Armor Description • Team Kirby Clash Deluxe

This is referring to the battle with Dark Mind. Kirby was using MK's sword when he defeated him so soul destruction applies to Galaxia and by proxy MK.

Also Kirby should probably get soul resistance alongside Dedede for surviving attacks from it.

 

[Eficiente]

Iirc it was a mistranslation.

 

[Eficiente]

"ÒüïÒüñÒüª ÚÅíÒü«Õø¢ÒéÆ µö»ÚàìÒüøÒéôÒü¿ÒüùÒüƒÞÇàÒü« Þúàþö▓ÒÇé ÒüØÒü« µé¬Òü«Õ┐âÒü» Òü▓Òü¿ÒüÁÒéèÒü« ÕëúÒü½ÒéêÒéè ÒüÅÒüáÒüæÒüíÒüúÒüƒ Òü¿ÒüäÒüåÒÇé[1]"

At least Kirby should still have that resistance tho, the reasons are in my final CRT about the verse, which is still open.