Pokémon : S3 | E13 – Ignorance Is Blissey

While Ash and his friends continue to make their way to the Violet Gym, they find themselves looking for a place to spend the night in a quiet area called Happy Town. Tired, hungry, and dirty, Ash knocks on the door of a locked Pokémon Center and, to his surprise, is greeted by a Blissey. After noticing Ash's hunger, Blissey tries to give Ash some sweets, but ends up spilling it on Ash. While washing it off, Blissey suggests that she wash his back, but ends up scratching him. While she tries to attend to the scratch, she puts too much alcohol on him, and in the end, he is in a full-body cast. Nurse Joy eventually wakes up and apologizes for Blissey's trouble.

Outside, James devises a plan to sneak into the Pokémon Center and steal some Pokémon and some food for the equally hungry Team Rocket. However, once they get inside, they find themselves in an empty kitchen with nothing to eat. Meowth finds a parsnip in the fridge, but refuses to share it and runs off. Jessie goes looking for him, but finds a Blissey in the hallway. The Blissey tackles Jessie in joy; Jessie initially thinks that she tackled her to stop her, but then notices that Blissey's egg necklace has only its upper half. Jessie pulls out the bottom half, connects the pieces, and then remembers Blissey.
(Source: Bulbapedia)