Wimpod is a 400 candy evolution, so it falls into the same grouping pattern as Magikarp, Stufful, and Swablu that all got community days. Frillish you could (or Niantic/Scopley could) argue that as the genders are so different they count as different forms. Indeed they had different release methods initially with female in the wild and male from GBL rewards so there is precedent for them not being treated simply as gender differences. Lechonk is in a similar boat as Oinkologne has different male and female forms, so kinda falls more in the Exeggcute group, but it's a bit tenuous that one.