Route 42 is a Johto route linking Ecruteak City to Mahogany Town. There are three ways to cross it. The first way is to Surf through the waters, the second way is to cross through Mt. Mortar, the cave that runs all along the route, and the third way is to use Dig on the burrows near the two opposite entrances of that cave.
Notable miscellanies
Mt. Mortar
- Main article: Mt. Mortar
Running along Route 42 is Mt. Mortar, with 4 different entrances. The westmost and eastmost entrances are connected together in a straight path, however wandering off that path, or entering the cave from the two middle entrances, the cave will become a maze.
Punch Tutor
A Move Tutor for the three elemental punch moves, Fire Punch, Ice Punch and Thunder Punch, is located in the north-east corner, requiring Rock Climb to reach him. He will teach these moves to any compatible Pokémon for the price of 
4,500 each.
Wild Pokémon
Land
Surfing
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| Pokémon | Level range | Times | Held Item | Rod | Rarity Tier |
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- Pink-colored names denote that this Pokémon is exclusively encounterable for members in this area.
- All Pokémon tabulated here can only be encountered via fishing; they are not Surf-encounterable.
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Items
| Item | Quantity | Cooldown | Location |
|---|
 |
Ultra Ball |
1 |
Not respawnable |
Hidden item. Between trees near the water in the south-east of the middle-south Mt. Mortar entrance |
 |
Sitrus Berry |
1-3 |
3 days |
Berry Tree near the middle north Mt. Mortar entrance |
 |
Lum Berry |
1-3 |
3 days |
Berry Tree near the middle north Mt. Mortar entrance |
NPC Trainers
Route 42 Trainers |
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All NPCs cool down after 7 days unless noted contrariwise.
All NPCs may have new Pokémons, or higher level Pokémons upon rematch unless noted contrariwise. |
4,500 each.
