S01 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon All-Stars (Region 1) - Bulbapedia, the community-driven Pokémon encyclopedia

File:Indigo League Box 3 Cover.png - Bulbapedia, the community-driven Pokémon encyclopedia

EP001 - Bulbapedia, the community-driven Pokémon encyclopedia

Porygon (Vending S1) - Bulbapedia, the community-driven Pokémon encyclopedia

EP005 - Bulbapedia, the community-driven Pokémon encyclopedia

EP011 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon: Indigo League - Wikipedia

Professor Oak (anime) - Bulbapedia, the community-driven Pokémon encyclopedia

List of English language Indigo League home video releases (Region 4) - Bulbapedia, the community-driven Pokémon encyclopedia

EP002 - Bulbapedia, the community-driven Pokémon encyclopedia

EP027 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Season 1 & 2 - Limited Edition Collection - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Sinnoh Collection - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Season 1 & 2 - Limited Edition Collection - Bulbapedia, the community-driven Pokémon encyclopedia

Animals in the Pokémon world - Bulbapedia, the community-driven Pokémon encyclopedia