OldPokemon is a free browser-based online game for fans of the Pokémon world, playable on computers and phones. Players catch and train Pokémon, build and improve a team, complete their Pokédex, explore regions including Johto, Kanto and Hoenn, capture locations, collect cards, and battle other trainers. The game also features competitive events, including a Champions League season with gym battles, badges and a final tournament, alongside official tournaments that reward participants with tokens and prizes.

Players can develop their Pokémon through training, hunting and crafting, using in-game items, technical machines and other resources. Features include a Pokédex with information on Pokémon generations, animated battle forms, rare alpha Pokémon encounters and a Safari Zone in Hoenn. The game’s evolving content is shared through regular news updates, which announce new items, mechanics, locations and balance changes. OldPokemon also provides rules and guidance for newcomers, a forum for player discussion and feedback, and account registration for access to the game.