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In Kiloude City, after defeating the Elite 4, you could challenge your rival whohas in his/her party an Absol holding an Absolite. Is it possible to use Thief/Covet on this Absol before it MegaEvolves and keep the Absolite?

by
I think yes.
No. Mega stone are 'stuck' to the pokémon that can use them. If the pokémon is holding its mega stone, it's can't be stolen or knocked off, and will still be able to activate in magic room or under effects of embargo.

2 Answers

2 votes
 
Best answer

No. Mega Stones cannot be stolen/swapped.

Source: Experience

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selected by
3 votes

No.
Firstly, Mega Evolving takes priority over using any move at all, so you won't be able to steal the mega stone before it evolves.
Secondly:
>Mega Stones ... cannot be taken via Thief and Covet, cause Trick and Switcheroo to fail if used on or by the holder, and cause Fling and Bestow to fail if used by the holder. Embargo and Magic Room also cannot prevent the use of Mega Stones to Mega Evolve Pokémon. Mega Stones are not consumed upon use.

So it won't work

Source: Bulbapedia

by
I NEVER get BA. Someone always answers with something better :'( jk +1
I'll point out I don't have BA yet, either :)