Meowth wants to enjoy the last days of its vacation with a picnic lunch in the park. But Meowth's sandwich starts floating in the air, and it zooms away when Meowth tries to chase it! Meowth chases the sandwich through the park and runs right through the special reception Azumarill is preparing for Azurill, who is coming from out of down. After a commotion like that, all the Pokémon friends end up chasing the sandwich! When the sandwich goes flying, Teddiursa catches it and gobbles it down in one gulp. The other Pokémon spot a footprint that suggests it was an invisible Pokémon who first swiped the sandwich, but who?
Just then, Meowth sees a strange red stripe floating by. This must be the invisible Pokémon! One of the Pichu Bros. asks a Smeargle for help, and Smeargle throws paint around until the invisible Pokémon is covered in paint and plain to see. It's a Kecleon! Kecleon runs away, but its paint-covered footsteps lead the others to a empty pipe. Inside the pipe are Kecleon and the Azurill that Azumarill was waiting for: Kecleon was stealing the food for Azurill! Once everything is cleared up, the Pokémon settle down to a delicious picnic with friends.
The next day, the Pichu Bros. are helping Azumarill look after Azurill. But as soon as they take their eyes off the little Pokémon, it disappears! The Pichu Bros. gather all of their friends to help them find Azurill. Even though they can see it, they can hardly catch up as it bounces all over town! Not far away, Meowth is trying to win a pretty Skitty's heart with roses when Azurill bounces past, switching Meowth's roses for a bundle of laundry. Skitty is not impressed.
For Meowth's next attempt at romance, it tries to give Skitty a cake, but Azurill steals the cake and eats it. Then Meowth sings a romantic serenade, only to have Azurill ruin this chance at love, too! That's when the Pokémon pals show up and grab Azurill, while Meowth ends up stuck under a Snorlax. So much for love; Meowth decides to settle for a nice, peaceful nap instead!