Pokémon Gold and Silver/Mt. Mortar — StrategyWiki

Although you can access Mt. Mortar earlier in the game, you won't have Waterfall the first time you pass by. To conquer the inside of the mountain properly, you
Although you can access Mt. Mortar earlier in the game, you won't have Waterfall the first time you pass by. To conquer the inside of the mountain properly, you

Appendix:Gold and Silver walkthrough/Section 10 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokemon HeartGold and SoulSilver :: Game Maps

Pokémon Gold and Silver/Mt. Mortar — StrategyWiki

Pokémon Gold and Silver Versions - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Gold and Silver Versions - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Gold and Silver/Ruins of Alph — StrategyWiki

Pokémon Gold and Silver/Route 42 — StrategyWiki

Pokémon Gold and Silver/Route 43 — StrategyWiki

Pokemon Silver [#32] - First Visit to Mt. Mortar and Route 42 - (GBC)