Monster catching/training:
* Digimon (1999): Like Pokémon, this anime features creatures called "Digimon" that evolve and battle. The main characters travel through a digital world, training their Digimon and facing various threats.
* The Adventures of the Gummi Bears (1985): While not focusing on battles, the Gummi Bears collect "gummiberry juice" which gives them powers. They use these powers to overcome obstacles and fight villains, similar to Pokémon using their abilities.
* The Mysterious Cities of Gold (1982): This show features a young boy who discovers a mysterious artifact that allows him to control the powers of animals, similar to how trainers use Poké Balls.
Friendship and adventure:
* Captain Planet and the Planeteers (1990): This environmental cartoon features five children who can control elements and work together to protect the planet. They travel to different locations, facing ecological threats, much like Pokémon trainers journey through regions.
* He-Man and the Masters of the Universe (1983): This show features a group of heroes who fight against evil forces using magical powers. The emphasis on teamwork and adventure resonates with Pokémon's themes.
Competition and tournaments:
* The Powerpuff Girls (1998): Although not a monster-catching show, it features three sisters who use their superpowers to protect their city. They often participate in competitions and battles, similar to Pokémon battles.
* The Transformers (1984): The Transformers series features robots who transform into vehicles and engage in battles. While not focusing on catching creatures, it explores the concept of competition and teamwork, similar to Pokémon battles.
Ultimately, the best "old TV show similar to Pokémon" depends on which aspects of the show you're most interested in.