I'm pretty sure that Tentacool knew what he was doing, he just didn't expect it to be that fast.
This is a dub of Comic by VelvetExplosion which features Nurse Joy getting inflated by a tentacool
Original Artist: https://www.deviantart.com/velvetexplosion/art/Nurse-Joy-Inflation-Page-1-459744204
My Patreon: https://www.patreon.com/AmpleExpansion
Voice Actress: megthelovabledork - Nurse Joy, May, Roxanne
Channel: https://www.youtube.com/channel/UCpEmRRCYauV8A6qMa6HXhXA/featured
I'm pretty sure that Tentacool knew what he was doing, he just didn't expect it to be that fast.