I personally spit whatever I was drinking at the time when backlot began rambling about wild Porygons, and that impression has survived to present date and found its way into a strip. This isn't common knowledge though, so those who doesn't get it have no reason to lower their heads in shame.

And yes, I know you can't get pokémon through casinos in Gen IV, and yes, I know of that one Porygon which can be earned as a gift in Platinum (although that in turn cancels the possiblity to find them in the garden).

Next week's update has a long way to go though, and my weekend won't be dedicated to it as I'll be busy elsewhere, but I prefer to be optimistic.