Can I check if a Mew is still inside a PokeBall Plus?

I am planning to buy a used PokeBall Plus.

The seller says that they don't know anything about the Mew.

To my understanding, the only way to check is to just try to do the mystery gift and claim it, but I shouldn't do it before buying, and prefer to keep it unclaimed regardless.

My question is, is there a way to check? I've heard something about a purple light if it's still there, but I can't find anything about it now.

Thanks.

reddit.com
u/roeidana — 1 day ago

Looking for someone to Gigantamax my Meowth

I'm not really sure what tags to put so I hope this is ok.

I am looking for someone who has the Isle of Armor DLC for Pokemon Sword or Shield who can help me out. I'd like to trade them a Kantonian Meowth I bred, have them feed it Max Soup, and then trade it back to me.

I don't have anything I'd consider valuable, but you can tell me if you have something specific you want and I'll see if I have or can get it for you.

I'd like to do the trade through home, as I don't have Nintendo online.

Thank you.

reddit.com
u/roeidana — 3 days ago