What are some alternatives?
When comparing Tuxemon and OpMon, you can also consider the following products
PokeMMO - 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.
Pokémon (series) - The official source for Pokémon news and information on the Pokémon Trading Card Game, apps, video games, animation, and the Pokédex.
EvoCreo - Embark on a journey through the world of Zenith.
Temtem - Temtem is a Massively Multiplayer Online and Role-playing video game released by Humble Bundle for PC and expecting to release for Console in earlier 2021.
Pokemon Showdown - Pokemon Showdown is a 2D, Fighting, Single and Multiplayer video game.
Pokemon World Online - Pokemon World Online - Free Pokemon MMORPG.