38 new episodes have been added from three different seasons. Highlights include Ash's foray into the Indigo League, Otoshi's amazing facial expressions, the introduction of Ritchie, the first heist pulled by Jessie and James (and Meowth), Sakura versus Misty, the most kickass Bellsprout ever, Ash versus Roxanne, May and Jessie both catch a Wurmple, and a Pokémon apocalypse thwarted by an enormous Jigglypuff.
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: 71-79 complete
Chronicles: 2-21 complete
The full directory of all Pokémon seasons is here.