Route 30 - Pokemon Gold, Silver and Crystal Guide - IGN

Pokemon Gold, Silver and Crystal at IGN: walkthroughs, items, maps, video tips, and strategies

Olivine City - Pokemon Gold, Silver and Crystal Guide - IGN

List of Pokemon (Pokedex) - Pokemon Gold, Silver and Crystal Guide

Union Cave - Pokemon Gold, Silver and Crystal Guide - IGN

Ecruteak City - Pokemon Gold, Silver and Crystal Guide - IGN

Pokemon Gold Version - IGN

Pokemon Crystal Version [Walkthroughs] - IGN

Johto Route 31 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokemon Gold, Silver and Crystal Guide - IGN

Johto Route 30 - Bulbapedia, the community-driven Pokémon encyclopedia

Azalea Town Gym - Pokemon Gold, Silver and Crystal Guide - IGN