Pokemon
A young boy named Ash embarks on a journey to become a "Pokémon Master" with his first Pokémon, Pikachu. Joining him on his travels are Brock, a girl-obsessed Rock Pokemon Trainer, and Misty, a tomboyish Water Pokémon Trainer who may have a crush on him. They end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokémon League competitions there. Along the way, they run into many confrontations with Pokémon thieves who are apart of an evil organization called "Team Rocket". But every time Team Rocket try to do their evil deeds, they fail thanks to Ash and his Pokémon.
Sailor Moon
Usagi Tsukino is an average student and crybaby klutz who constantly scores low on her tests. Unexpectedly, her humdrum life is turned upside down when she saves a cat with a crescent moon on its head from danger. The cat, named Luna, later reveals that their meeting was not an accident: Usagi is destined to become Sailor Moon, a planetary guardian with the power to protect the Earth. Given a special brooch that allows her to transform, she must use her new powers to save the city from evil energy-stealing monsters sent by the malevolent Queen Beryl of the Dark Kingdom.
But getting accustomed to her powers and fighting villains are not the only things she has to worry about. She must find the lost princess of the Moon Kingdom, the other Sailor Guardians, and the Legendary Silver Crystal in order to save the planet from destruction.
(Source: MAL Rewrite)
Yu-Gi-Oh!
Yu-Gi-Oh! Duel Monsters centers around the journey of the spirit of an ancient Egyptian pharaoh who is trying to re-discover who he was many years ago, since he has lost his memories. With the help of a boy, Yugi Mutou, the one who awakened the spirit, and his friends, he battles many villains and adversaries. Many of the villains have been linked to the Nameless Pharaoh's past, due to the Millennium Puzzle he holds and many try to take the puzzle and his power away from him.
The series focuses on the card game aspect of it and the main theme represented throughout the series is friendship.
