These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Sonic's Schoolhouse
Fridge Horror: It's possible the students are normal animals taken from their homes and forced to learn human ways, given the designs, field trips, and the fact they only make animal noises. It is very possible that they are dead of old age or predation by the time of adventure.