Erubato

Gracias,me sirvió mucho

Can nature reroll tickets be traded? I don't have pve coins, nor do I know how to get them. and I want to change the nature of a Pokémon I have. If it is possible, please tell me

It turns out that I went to mt silver and lost against red, I wanted to go again another day but he doesn't appear anymore, my question is if I lost against him, have I already lost the possibility of being able to capture mew? (I think I read that one of the requirements was to beat Red)

If I lose against red, will this no longer count to be able to access mew? (one of the requirements is to beat the red)