Gardevoir are made for longer - studies have shown that they won't make it much past the 90-day mark. With those factors, I think you can do it.

For the record, this is the female version of a Porygon - a ball that was first released in March 2015. Pokemon Go doesn't have a Porygon, and I'd prefer not to play as one either, but I'm not exactly getting a good deal out of my subscription.

EDIT: As far as the Porygon we get this month, I got this cute custom Pokéball - Noretta. I think she looks awesome, but even if it turns out that she's a pretty girly ball, I'm still thrilled to receive the order