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Tear Jerker: Hotel Transylvania
"Dad, can you do me a favor?" "Yes, of course darling, anything." "Will you erase my mind?"
Even more horrible for Drac, knowing that he actually can.
Him reading Martha's gift to Mavis also gets you.
The backstory that reveals Drac's wife was killed by humans. It's a gut-wrenching sequence, and it suddenly puts all of Drac's overprotectiveness, obsessive secrecy, and hatred of humans into incredibly sharp clarity.
Jonathan lying to Mavis about how he doesn't want to be with her and that he hates monsters. The look on her face just screams heartbreaking.