As you know, the Trophy Garden Pokemon (national dex) stay in the garden in Diamond/Pearl for as long as you wish provided you do not speak to Backlot. I know this because I've already had Eevee and Porygon for months and months and months.
My question is: is this the same in Platinum? Or are they inevitably gone two days after?
My question is: is this the same in Platinum? Or are they inevitably gone two days after?