Gwen just kept filling your womb with all her fluids, you almost fainted in the process but at the end she gave you the biggest orgasm of your life, making Gwen the winner of the battle.
Your rival slipped out from your constantly dripping pussy in her snake form, then she slowly began to transform into her original body, growing again her arms and her skin returning to normal replacing her slimy one. After that you saw how she spreaded her vagina with her fingers to make her Slithertail come out from her insides.
Gwen stood up looking you fainted on the floor. "It seems that you need to work in your relationship with your monster" she giggled, "mine and I are like one even if we aren't fused!" Her slime snake hissed and licked Gwen's cheek.
"Bravo!" The professor Rosalie clapped after watching the amazing show between her students. "It seems that you two mastered the monster fusion!" She smiled.
You felt your body returning to its origins too, looking how your Sneakat started to come out from your stomach like it was clay, everytime your monster came out even more your fur disappeared and your cat-snakes attributes disappeared along with your penis shrinking into your original clitoris. Your monster and you returned to normal but your pussy were still dripping, so you began to clean it as your monster teased you biting your leg. "You shouldn't do that to your trainer, you know?" You commanded but he still disobeyed, thinking on your long way to go.
Both you and Gwen were standing in front of the professor, hearing her instructions. "Well, now that you now the basics and core of monster fusion you can explore the world you have in front! But first you'll need these".
She gifted you and Gwen some Monster cubes. "These are capsules that are very fundamental of you want to catch more monsters and build a strong team, of course not all the time they will work, the tougher the monster the harder it will be to catch them, just throw one of these bad boys to the monster you want to catch and the cube will open and trap them, if it doesn't fail the capsule will fully contain it and become part of your team. I think that's all you need to know".
Gwen stored the monster cubes in her bag. "Thank you mom, I suppose... Meanwhile Sally, I will catch the strongest monsters you would ever see and destroy you like I did!" She laughed and ran away from the lab.
The Professor smiled at you embarrassingly, "Don't mind her, she has always been like that since she was a little girl passionate about monsters haha" she said and then looked at your Sneakat keep biting your right leg. "It seems that you need to improve a little more your bond with your monster, if you don't every time you merge with him it can result on incomplete fusions or weird ones, but don't worry, practice makes the master!"
You thanked Professor Rosalie and exited the lab, seeming that Gwen left a long time ago to catch her monsters.
You heard something nearby, without a doubt you decided to explore.