ITT Cartoon plots that you see a million times and don't know why they are used so much. I will start.
>Character is sick
>In order to save him the rest of the team or the main character has to shrink really small and go inside his body to save his life
>most of the time they have to do so in a time limit or they grow back to normal size
Is this a reference to a book or a movie because I have seriously seen this exact same plot happen over 25 times in cartoons.