Client Illusion + Mega Evolution

[iforgetwhyimhere :D]

What type of bug are you reporting? Mechanics

What is the bug?
Pokemon with Illusion that Mega Evolve keep the Illusion and it cannot be broken.
When KOing the Illusion-ed pokemon, the error appears.

TypeError: Cannot read properties of null (reading 'removeVolatile')
at Battle.runMinor (https://play.pokemonshowdown.com/js/battle.js?0.4845945808334662:2460:9)

Original Replay

Are you able to replicate it? If so, how?
Yes, use a Pokemon holding its Mega Stone whilst having Illusion. Mega Evolve, then KO the mega evolved Pokemon.

seen here: Testing Replay

 

[Cazenovia]

The testing replay was not saved, but I can confirm that the error does occur when the mega is KO'd while still Illusioned here.

Pokemon with Illusion that Mega Evolve keep the Illusion and it cannot be broken.

This is how the mechanic works on cartridge and is not a bug.

 

[Hydrametr0nice]

This is how the mechanic works on cartridge and is not a bug.

Correct. The error message is another client-side bug where it can't track the Illusion.