I love imagining swapping the protagonists of totally incompatable shows.
Aang from Avatar the last airbender and Danny Phantom.
Aang sets up a therapy program for ghosts so they can talk out their problems without the need for excess violence. He and Sam get along very well, as they have many ideals in common. He and Tucker also get along well, because Tucker reminds him of Sokka. Aang is essentially on vacation from being the avatar for a bit.
Danny feels obligated to do Aang's job, since he's the reason Aang isn't here. But unfortunately, ghost powers and bending aren't very similar. He can mostly do the bridge-to-the-spirit-world job since he's a half-ghost anyway, and he has a ton of fun fighting Zuko. But an entire army is a little out of his ability. Mostly he's fine until they get to book 3 stuff.
Aphmau from Minecraft diaries and Izuku Midoriya from My hero academia.
Izuku shows up in Phoenix Drop with no idea what's going on, but he gets the scoop pretty quickly. Suddenly their Zane problems go from 'insurmountable' to 'yeah, Midoriya can take care of that in a couple of weeks'.
Meanwhile, Aphmau gets to spend some time in an enviorment where there are people already used to dealing with young people who have no idea how to control their powers, and she gets some time to actually practice with competant teachers.
