Project Update
29 new episodes have been added from three different seasons. Highlights include Meowth and Meowsie, Jynx stealing toys from children, a surfing Pikachu, Arbok and Weezing leaving Team Rocket, Cacnea and Seviper joining Team Rocket, Ash catching Treecko, Ash and Dawn's first contests in Sinnoh, J's first appearance, Dawn catching Pachirisu, Roark's gym battle, and the B-Button League.
Fair warning, the pages might take a bit to load for dial-up users because there are four thumbnails as a preview for each episode.
Indigo: 62-70
Advanced: 6-12
Diamond and Pearl: 9-21
The full directory of all Pokémon seasons is here.