Kanto, Kanto, Kanto. This should not be a question. There were a few duds, but most Kanto fillers were written with a sense of the writers actually having fun creating them.
You really didn't know? And you still got two Badges!?! HOW FUNNY! A Pikachu evolves into an Electric Pokémon called Raichu, it gets to be about 2 feet 7 inches tall, Pikachu can shock you, but otherwise it's pretty cute, don't you think? So if you don't let them evolve, they make great pets, especially for little girls, but I'm sure you knew that? Didn't you? REALLY? You didn't? And you have TWO badges? AHAHAHAHAHA-AHAHAHAHAHAHA!!!!!!