Meowth hosts a large party event. When invitations are delayed rather than intentionally withheld, the Pichu brothers initially believe they were excluded, creating a central misunderstanding. After the invitations finally arrive and the confusion resolves, they attend the party.

During the celebration, Meowth performs a song sequence rendered in 3D computer graphics, a visual style contrasting with the rest of the production. His actions and animations in this musical segment are randomly generated for each viewing, ensuring variability in his movements and expressions. Jessie and James appear within this sequence as 2D paper-style characters integrated into the 3D environment.

The song "Meowth's Party" features lyrics expressing Meowth's anticipation about potential guests and his perspective as host. Themes include scattering specially designed invitations on crescent moon-shaped tickets using gold and silver crayons, decorative stardust toppings on cakes, and creating the party venue under the night sky. The lyrics convey both uncertainty about attendance and hopeful excitement for the event's success.

This portrayal maintains Meowth's established characteristics without human speech abilities, aligning with his recurring media role while focusing on party hosting and entertainment. The technical implementation of the 3D sequence demonstrates an experimental approach through variable animation parameters during the musical performance.