I’m sure there’s a limit of how many boxes you get.
Does anyone know what happens? Like Reshiram/Zekrom, does it just go somewhere else to be caught later, or does it just faint and you can’t get it again or…?
Pleaselog inorregisterto add a comment.
I have no source to confirm this, but this is probably right.
Apparently, when you engage in a battle with Xerneas/Yveltal, regardless of whether you defeat it or catch it or whatever, a newBox 31will be created in your PC.
So, really, there is no way your entire PC can be full of Pokemon, the captured Xerneas/Yveltal will just go to the newly created Box 31.
Hope I helped. :)Source
You can catch the Pokemon but you are not allowed to keep it, sorry.Hope I helped!