I was able to find this one at the Goldenrod department store as a backup for the tent I had from the battle convention from a couple of years ago. It is at a good price at the time so I bought it as it is big enough to accommodate larger Pokémon that I would get eventually.

I actually packed it with me instead of the main travel tent when I got teleported to Mahogany Town during one of the more recent weird weekends.