Since there's no way to shrink down to Tink's size on the ship, aka Pixie Hollow, I don't think that Tink will appear for meet and greets on the ships. She does make an appearance in Dreams however.
Why should size matter There a couple of "mice" (Mickey, Minnie, Suzi and Perla) onboard that are the size of a dog (Pluto). If Tink does come to meet and greets onboard Peter will not be around.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!