Rare Pokemon in my Pokemon Box

[Marioipod13]

https://m.youtube.com/watch?v=7dLRLIRnV2k

I found some extremely rare Pokemon in my Pokemon Box recently. Like, mythical tier Pokemon such as Mew, Celebi, Jirachi, and Deoxys. They have been in there the whole time and I didn't know.

Does anyone else even know what Pokemon Box is?

[Sylveon_Grl]

I have a shiny Meloetta that I got from a trade on Scarlet