42 new episodes have been added from two different seasons, in addition to a movie. Highlights include Gligarman, Ash obtaining the Johto starters, Jessie failing to become a nurse, the first three Johto gym leaders, Charizard and Squirtle leaving, Ursaring troubles, James as a Moltres, and Deoxys versus Rayquaza.
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.
Johto Journeys: 10-41 complete
Johto League Champions: 1-10
Movies: Destiny Deoxys
The full directory of all Pokémon seasons is here.