So Ive got this thing is legit magical or something. Just for fun, I took along my 12" Lugia plush to a group raid- someone actually brought their kids, so that ended up being a hit kek.
Point being, I held onto it for the entire time- popped a shiny.

Next raid, gave it to someone else to hold.
They popped a shiny.

This stuffed Lugia
Has better shiny luck than I do
Seems legit

Shadowwisper
Red_Gallade_Duelist
EeveelutionBrandi
StormFox9
(I don't remember who plays GO and who doesn't lol)