After leaving the breeding center, Todd notices a sign in a restaurant, advertising an all-you-can-eat meal for free. He believes that there is a catch, but the group heads in regardless. The owner tells the group that he will give them a free meal if they can guess and show him his favorite Pokémon. Everyone releases all of their Pokémon, except Ash’s Charizard, but the owner says that none of them are his favorite. He pulls out a picture of a Psyduck. Shocked, Misty asks him if the restaurant will still be open later in the evening. The owner informs her that he will be, and the group heads back to the breeding center to retrieve Psyduck, only to find it closed. Todd tells her they could wait until tomorrow, but Misty angrily tells him she wants to get Psyduck then and there. Snooping around the rear, they find a backdoor. Misty furiously knocks, though she soon notices the door is unlocked, and the group walks inside.
(Source: Bulbapedia)