
While being let out to play by their trainers, Pikachu and Piplup wind up separated from their Pokémon friends and wind up travelling with a Skitty into a strange dimension, unknowingly followed by Croagunk, Team Rocket's Pokémon and a Marill that's desperate to have someone hear her sing... (Source: Bulbapedia)
Pikachu no Fushigi na Fushigi na Daibouken is a Japanese anime of 2,978 characters, with 406 unique words and 191 different kanji. Its difficulty rating on Jiten is easy, 1.4 out of 5. The full vocabulary list ranks all 406 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.