Pokémon Online is the most up to date pokémon battle simulator around the block.
Pokemon Showdown is a 2D, Fighting, Single and Multiplayer video game.
Dream Module Games
Monster MMORPG: Free Pokemon Online MMO RPG Game.
Bulu Monster allows the user to become a monster trainer on Bulu Island.
An open source Pokemon clone, with monster fights
Pokemon World Online - Free Pokemon MMORPG.
Completely open source monster fighting RPG - capture and battle monsters against others!
Lovable monsters are out there! Walk into the meadow and catch 'em all!
Embark on a journey through the world of Zenith.
PokeMMO is an Amazing, Action-Adventure, Massively Multiplayer Online, Role-playing and Puzzle video game that provides with the same mechanics and gameplay as Pokemon.