- Pokéarth Kanto Route 14
- Sea 21 - Pokemon Version Walkthrough & Guide - GameFAQs
- 21 - Red, Blue and Yellow Guide - IGN
- Pokemon Red Version 21 Map for Game Boy by KeyBlade999 - GameFAQs
- Let's Play Pokemon Fire Part 38: Route 21 the Gym - YouTube
- Sea 19 - Pokemon Red Version Walkthrough & Guide - GameFAQs
- Kanto Route 21 - the Pokémon encyclopedia
- Kanto Route 21 - the Pokémon encyclopedia
- FireRed hack: Red: BACKWARDS Edition - The PokéCommunity
- Kanto Route 21 - the Pokémon encyclopedia
- Let's Pokemon Fire Red Part 57: Route 21 YouTube
- Route | Planet Wikia | Fandom
- Route 21 | Infinite Fusion Wiki | Fandom
- Pokemon Blue Walkthrough - Kanto Route 21 - YouTube
- PokeMMO Wiki | Fandom
- Route 21 - Derniere Way - Pokemon X and Guide - IGN
- Pokemon: FireRed [#55] - Route 21 (no - YouTube
- Kanto Route - PokeMMO
- Pokémon FireRed and LeafGreen/Route 8 — StrategyWiki | Strategy and reference
- POKEMON 21, by PkmnSpinelle on DeviantArt
- Pokéarth Kanto Route 21
- Pokéarth Kanto Route 21
- Route 6 the community-driven Pokémon encyclopedia
- Kanto Route 12 - PokeMMO
- Pokemon Gold Version Route 21 Map Map for Game Boy Color by KeyBlade999 GameFAQs
- FireRed and LeafGreen/Route 22 — | Strategy guide game reference wiki
- Route 21 -