Pokémon Sun and Moon - Burnet and Wicke give Ditto a shot and put it in a cage

There, now this sweet little ditto is healthy as a can beeee………

…………. NOW IT'S TIME TO COOK IM'!

So is nobody going to question the fact that dittos can be given a shot?
I can understand HP and stuff but how the heck do you give a shot to something so goopy?