: The game implements a strict level cap based on your progress. Your Pokémon's maximum level is set to the highest level of the next Gym Leader plus 5.
Pokémon H Version -v0.625 B- is a ROM hack or a modified version of one of the mainline Pokémon games. The exact base game is not specified in available information, but based on the version number, it appears to be derived from Pokémon games of the earlier generations. ROM hacks like Pokémon H Version -v0.625 B- are created by fans or enthusiasts who modify the game code to introduce new features, storylines, or gameplay mechanics not present in the original game.