Simpsons Comics #222

"After being embarrassed and rejected by Bart, Homer takes an impressionable Ralph Wiggum under his wing. But it doesn't take long before Bart gets jealous and wants back in on the father/son/extra son relationship. Meanwhile, Lisa has problems of her own when she is responsible for disappearance the class hamster, only to discover a Lost World of long gone schoolroom pets in the deep recesses of Springfield Elementary a New Hamsterdam, if you will."