Pokémon : S21 | E48 – A Plethora of Pikachu!

Ash, Kiawe and Mimo discover an amazing place called Pikachu Valley, home to the biggest group of Pikachu they've ever seen! Their Trainer is a major pika-fan named Pikala, who gives everyone a set of Pikachu ears and a tail and insists that they all talk in Pikaspeak by adding "pika" to every sentence. At first, Ash's Pikachu seems to be a big hit with the ladies—but Pikala clarifies that they're just offering their usual pika-greetings. Annoyed by this behavior, the boss Pikachu challenges our buddy to a battle, but Ash's Pikachu wins—and then thwarts an attempt by Team Rocket to grab the whole group! (Source: Wikipedia)