As an AI text-based model, I can provide you with a simple example of how you could implement a text-based Pokémon game using HTML and JavaScript. Keep in mind that developing a full Pokémon game with all its features would require a significant amount of time and effort, so here's a basic example to get you started:
This is a very basic implementation of a text-based Pokémon game. It allows the player to choose a Pokémon from a predefined list and displays a welcome message with the player's name and the chosen Pokémon. The game logic would need to be implemented further to provide an actual game experience.
Please note that this is just a starting point, and developing a full-fledged Pokémon game would require much more code, graphics, and extensive game mechanics.