Prestiger?
Answers
I somehow managed to acquire two 100% IV Wigglies over the course of playing, one with P/HB and one with P/DG. I couldn't resist powering them up as far as I could, which does seriously limit their efficiency as prestigers, but in this current bug-ridden dodge-death-loop gym meta, having these two 1700+ Wigglytuffs is like having an insurance policy for when I encounter friendly gyms with Snorlaxes on the bottom.
I'm sure there's a sweet spot for CP depending on your local meta, but for sure you will find use for this guy when prestiging.
I might be late to this party, but....
I have 2 groups of Wigglys.
Group 1 they are all between 1150 and 1400 CP and I use them as Prestigers against Gyrados, Lapras and Snorlax.
Group 2 are all higher up to 1600 CP, and I often throw one or more into my attaker list as generalists.
They work very well.
I have an army of Wigglies, ranging from CP ~900 to ~1500. I prefer the P/HB moveset, but PR and DG work pretty well too. I usually use Wigglies for prestiging against Snorlax, and also as a generalist sixth prestiger that can slot in against any defender if one of my specialists falters prematurely. Having a Wiggly in the lineup helps me avoid having to use a specialist for the wrong job if things don't go according to plan.