Good dissection au. Danny is super curious what's going on inside his own body and trusts his parents. They give him proper anesthesia and take all sorts of safety precautions while doing a handful of exploratory surgeries, and make sure Danny has time to rest and fun flavored juices to drink afterward.
Crap yeah! I mean i don't really want a fic on the dissection itself but if there's a natural portal style crossover and someone mentions the scars and says he and his parents rummaged through his body to check how it works. He would talk about it the same way he talks about that afternoon when they decorated his ceiling with phosphorescent stars.
Danny doesn't even notice the weird looks he gets. I mean, he's a Fonton, his whole family been staring like crazy for years
Let's add that they must have filmed it, surely with the family video recorder. so we oscillate between cutting and moments like a camping weekend.
Maybe do this in the far frozen, frostbite would help plan and a lot of doctors would be curious about halfa