From the introduction:
This document contains the complete conversion rules for Pokémon into Dungeons and Dragons, as well as the conversion rules for Dungeons and Dragons into Pokémon. Whether you want to throw a Bulbasaur at your players as a one-off, or you want to play a whole Johto campaign with d20 rules, this is for you.
User summary:
This HTML resource is presented as hyperlinked data comprised of four major sections:
Pokémon in D&D (Game Balance; Playing without Pokémon)
Chapter 1 - The Pokémaster (Pokémaster Class; The NPC Pokémaster; The Epic Pokémaster)
Chapter 2 - Collecting Badges in the Pokémon World (Badge Matches and Gym Matches; Gym Warfare; Badges; Rules of Engagement)
Chapter 3 - The Pokédex
Chapter 3 - The Pokédex occasionally receives additions and (minor) revisions.
The HTML data has been converted to PDF format - the version noted here includes 360 files (most individual Pokémon) presenting 1,184 total pages.