Purely playful boops from their snoots being strong enough to send someone flying makes Phanpy perfect for pampies since they’d be able to boop with their “trunk” instead of their trunk, and you bet other people and Pokémon would be fine being on the butt end of bumps from poofy rumps given what everyone knows about Phanpy’s nose. The fact Phanpy can carry an adult on its back also creates the cute contrast of the baby giving caregivers the equivalent of piggyback rides, and such contexts where the toddler is the caregiver are all the more applicable for this particular Pokemon when their nose can be a hose for cleaning other kids and their backs are perfect for those Pokébabs rearing to plop their padded rears on Phanpy for fun joyrides.