Mechanics Pickpocket + Magician interaction

[Alex_Ike]

What type of bug are you reporting? Mechanics

What is the bug?
Hey i have the replay here: https://replay.pokemonshowdown.com/gen9ou-2359802836

On turn 1, choice scarf hoopa-u hits my focus sash weavile with drain punch. My pickpocket weavile steals the choice scarf from hoopa-u but hoopa-u suddenly steals it back with magician, even though it had the item when it attacked.

I'm actually not sure how this mechanic works in SV online since I have no way to quickly check. I'm wondering if this is an error, it seems like it would be since hoopa-u stole the item without ever attacking without an item - if that makes sense. I'm also wondering if this same mechanic works with pickpocket. If - for example - my weavile had brought hoopa-u down to a focus sash, and hoopa-u attacked my weavile without KO-ing it, would hoopa-u steal weavile's item with magician only to have it subsequently stolen back by weavile's pickpocket on the same turn?

I know this is super niche, but because of that I figured if I didn't report this probably no one else would.

Are you able to replicate it? If so, how?
Yes you can replicate it by recreating turn 1 in this replay: https://replay.pokemonshowdown.com/gen9ou-2359802836

 

[Hydrametr0nice]

Magician is supposed to always activate before Pickpocket. So, Weavile should have stolen Hoopa's item and kept it.
If Hoopa is the one without an item, then Magician should steal Weavile's item, and Weavile's Pickpocket should steal it back.

I’ve already fixed this interaction here—https://github.com/smogon/pokemon-showdown/pull/10899—it's just waiting for approval.

 

[Alex_Ike]

Wow that was so quick thank you!

Although, it was that magician should not have activated at all I think maybe that's the problem? Like when hoopa attacked it had it's choice scarf - magician only activates when attacking without an item. So when weavile pickpocketed hoopa's scarf, magician erroneously activated

 

[Hydrametr0nice]

Wow that was so quick thank you!

Although, it was that magician should not have activated at all I think maybe that's the problem? Like when hoopa attacked it had it's choice scarf - magician only activates when attacking without an item. So when weavile pickpocketed hoopa's scarf, magician erroneously activated

Yeah, in this case, only Pickpocket should have activated. I was just giving other examples to explain the correct interaction between the two abilities.