
Meowth is in charge of the Team Rocket secret base, a mysterious place full of odd gadgets and gizmos. Desperate to impress the boss, Meowth wants to use the Dancing PokéBaton—a device that lets users control Pokémon as they please—to create a show that’s sure to wow. Meanwhile, Pikachu and its friends finish up playing in the forest and stumble on the base. The gang hears Whismur, the Whisper Pokémon, crying for help—but when they try to make their rescue, the Dancing PokéBaton goes off and sends the whole group into a dancing frenzy! When a noise-loving Loudred and Ludicolo get caught up in the dancing, the madness gets even wilder! What’s going to happen to Meowth’s precious secret base?

This short seems to have only been created to help advertise the music that was created and that basically had a whole music video for in the first 5 minutes. The plot of the short is basically team rocket has built a secret base and are about to show it off to the boss and they leave their pokemon to guard the base and to prepare a dance number to impress the boss.
They will do this by using a magic stick Meowth has that makes all pokemon in the area dance, along with a few pokemon they have trapped.
Of course Pikachu and his friends discover the trapped pokemon and sneak in to free them, soon they are caught but the magic stick accidentally gets activated and they do a dance number to a rhythmic song (that is played EVERY time they dance) during the dancing parts of the base is damaged until the stick accidentally gets turned off, now a chase segment happens until yet again the stick is hit and they do another dance number, parts of the base gets damaged until it's accidentally turned off
This pattern keeps repeating for the rest of the 25 minutes of the short. Sure some bits are funny, but it's basically just watching pokemon dancing until eventually the base is destroyed. The end.