If you liked the Digimon Season 1: Digital Monsters anime, the Anime-Planet community thinks you'd like:
The year is 1969, and strange things are happening on Earth: a strange formation known as Brigadoon has appeared in the sky, and mysterious alien machines have begun to attack a seemingly ordinary orphan girl named Marin! Luckily for her, Marin finds an artifact which summons the alien Melan Blue to protect her – but there is more going on between Earth and Brigadoon than meets the eye. However there is more going on behind the scenes between Earth and Brigadoon. Along with a cast of quirky characters, Marin must get to the bottom of what’s going on, lest both Earth AND Brigadoon be destroyed forever!
The later parts of Digimon Adventure have much in common with Brigadoon: Marin to Melan. In both shows, our protagonists are children who look to the sky and, to their surprise, can see a strange "world" in the sky, and that world happens to be inhabited with colorful and strange creatures. Digimon Adventure, of course, is a much tamer show meant for a younger audience, while Brigadoon often falls into grim territory. If you liked the setting and world concepts in Digimon but want something darker (and often funnier), then give Brigadoon: Marin to Melan a shot. I promise you won't be disappointed!
Kimimaro Yoga could use a break. At nineteen years old, he's not only a student at Heisei College of Economics, he's also a part time employee and flat out broke. So when an eerie man offers the boy a special ATM card and an exorbitant amount of cash, Kimimaro gives in to temptation – but there's a catch. In exchange for his good fortune, Kimimaro's very future is put at stake, held as collateral by the Bank of Midas and tied to the amount of yen in his bank account. In addition, he must participate in a special battle every week in the mysterious 'Financial District' – a battle where losing against one's opponent can mean bankruptcy, a fate that carries an unthinkable cost in the normal world...
If you grew up watching mon fighting shows and want something similar but for older audiences you should watch C. In C the characters have cash cards with a creature inside called an asset which they use to fight each other for money.
Several decades ago, chemical elements began to disappear from the world, decimating the planet and resulting in the loss of 90% of Earth’s population. However, though the elements have vanished, they aren’t out of reach – they have materialized in Nega Earth, an opposing planet filled with strange monsters that morph into dangerous QEX when they absorb five kinds of positive elements. Normally, Element Hunters - children specially trained to retrieve these elements and battle QEX – travel to Nega Earth alone; but when Homi, Ren and Chiara stumble across a strange old castle, they find themselves chartered with tracking down the elements themselves. With little training, can these children help save the world and stay alive along the way?
Why Digimon and Element Hunters? Firstly, both series are about kids who are used to be normal until they are suddenly chosen to protect chaos further spreading across the world (in Digimon's case, the digital world, that will, if destroyed, trigger a chain reaction and the same thing would happen to the human world as well, in Element Hunters, to protect the world from further disappearance of elements that are vital for surviving). Secondly, it involves fighting big monsters that are, if destroyed, either turned back to an egg (Digimon) and becomes harmless, or the targeted element is released and obtained and the monster, again, becomes harmless. Thirdly, the characters are simmilar, although rather fewer in EH's case. While EH maybe tends to be a little more mature and serious than Digimon, I think it is regardless a good match, with the same "never give up" feel to it, good music, interesting characters and simmilar humor!
Naruto Uzumaki is a young ninja who bears a great power hidden inside him, a power that has isolated him from the rest of his village. As such, his only dream is to become the Hokage - the most powerful ninja, and leader of the village; but first he needs to graduate! With his inability to perform even the most basic ninja techniques, it seems that all Naruto has going for him is his determination to succeed no matter what. Teamed up with the genius Sasuke, book-smart Sakura, and their team leader Kakashi, Naruto embarks on his quest to become the Hokage. But with outside forces posing a threat to the entire Hidden Leaf village, Naruto discovers that he must become much stronger if he ever wants to realize his dream and protect the friendships he's forged.
Naruto and Digimon offer you a simple concept: any power you can imagine is more than likely a jutsu that a skilled shinobi can execute or a power that belongs to a digital monster somewhere. The sheer scope of the abilities portrayed in these shows is ridiculous. Mix in a team fighting for good, violence as the default problem-solving tool, and a young male target audience, and you've got a solid connection. :)
Created in a lab to be the world’s strongest pokemon, Mewtwo is the only of his kind. With the help of Ash and friends, Mewtwo and the rest of the created pokemon managed to escape the clutches of Giovanni, Team Rocket’s leader, and set forth to find a place they could call their own. Now, Giovanni has managed to find Mewtwo and friends in a remote part of the Johto region, and Ash and the gang are caught right in the middle of the battle. All Mewtwo wants is to understand his purpose in life and live in peace; can Giovanni be stopped for good with the help of Ash, Misty, and Brock?
They both have cute little characters in them and are centered mostly on a genre for children. I loved these when I was growing up, because of the adventure and comedy in them. Both series also show the value of friendship and surmounting obstacles with determination and perseverance.