The Adventures of Sonic the Hedgehog

Robotnik somehow invents a ray that makes people turn into babies, and shoots Sonic and Tails. However, he also shot himself! An overly hyper baby Sonic, a baby Tails that can speak few words, and the bully-like Baby Robotnik are taken to daycare, where they must go the whole day without a time-out until the effects wear off. Scratch and Grounder use multiple disguises to try and trick the owner of the daycare into thinking they're the kid's parents, but none work.