Johto field journalPokémon HeartGold / SoulSilverGUIDES

Route 4 HGSS · Kanto Route

Route 4 on the Kanto map
Route 4 on the Kanto Pokégear map

Route 4 is a short downhill road in Kanto that runs from the eastern exit of Mt. Moon to Cerulean City. In HeartGold and SoulSilver it is one-way: ledges let you hop down toward Cerulean, but you can’t climb back up to Mt. Moon from the city side. You usually pass through it in the post-game while heading back east from Pewter City.

Region
Kanto
Wild Pokémon
12
Items
3
Trainers
3
HMs
Surf

Connects to: Mt. Moon · Cerulean City

Wild Pokémon

Tall grass encounter rate 20
PokémonTypeLv.MorningDayNight
SpearowHGNormalFlying5–855%55%30%
SpearowSSNormalFlying5–835%35%–
RattataHGNormal5–1035%35%30%
RattataSSNormal5–830%30%35%
JigglypuffNormal610%10%10%
ZubatPoisonFlying5––30%
EkansSSPoison820%20%20%
ArbokSSPoison105%5%5%
Hoenn SoundLinoone 20%, Lv. 8 Whismur 20%, Lv. 5Play the Hoenn Sound radio channel (after the National Pokédex): replaces four 10% grass slots.
Sinnoh SoundBidoof 20%, Lv. 8 Buizel 20%, Lv. 5Play the Sinnoh Sound radio channel (after the National Pokédex): replaces four 10% grass slots.
Surfing encounter rate 15
PokémonTypeLv.Chance
GoldeenWater5–1090%
SeakingWater1010%
Fishing
RodPokémonLv.Chance
Old RodMagikarp1085%
Goldeen1015%
Good RodGoldeen2060%
Magikarp2040%
Super RodGoldeen4070%
Magikarp4020%
Seaking4010%
Headbutt: common trees 9 trees
PokémonTypeLv.Chance
HoothootNormalFlying6–750%
PinecoBug6–730%
WurmpleBug6–720%
Headbutt: rare trees
PokémonTypeLv.Chance
HoothootNormalFlying9–1080%
WurmpleBug9–1020%

Use Headbutt on a tree (taught by the tutor in Ilex Forest). Which trees are “common”, “rare” or empty depends on the last digit of your Trainer ID.

Chances are the game’s encounter slots: grass and caves 20/20/10/10/10/10/5/5/4/4/1/1, with every slot changing by time of day (morning 4:00–9:59, day 10:00–19:59, night 20:00–3:59); surfing 60/30/5/4/1; all three rods 40/30/15/10/5; Rock Smash 80/20; Headbutt 50/15/15/10/5/5. HG and SS mark Pokémon found in only one version. Where to find every Pokémon.

Trainers

TrainerPokémonPrize
PicnickerHopeFlaaffyFlaaffy 44₽704
PicnickerSharonFurretFurret 41RapidashRapidash 43₽688
Bird KeeperHankPidgeyPidgey 13PidgeotPidgeot 44₽1,408

Prize money is four times the level of the trainer’s last Pokémon times the trainer class’s rate (doubled in double battles). Trainers who give you their Pokégear number call when they want a rematch, with stronger teams as you progress.

Items

ItemHow
HP UpItem ball
Ultra BallHidden
Big MushroomHidden

Hidden items can be found with the Dowsing MCHN Pokégear app.

Tips

  • Travel only works from Mt. Moon to Cerulean City, so plan on reaching Mt. Moon from Route 3 instead.
  • Jigglypuff appears in the grass 10% of the time at any hour, and Zubat shows up at night.
  • Ekans and Arbok are only found here in SoulSilver.
  • An HP Up sits on the ledge on the right side, and an Ultra Ball and a Big Mushroom are hidden nearby.
  • The three Trainers here use Pokémon in the Lv40s, apart from Bird Keeper Hank’s Lv13 Pidgey.
  • With Surf, the pond gives Goldeen 90% and Seaking 10%.

Walkthrough: Part 21: Mt. Moon, Cinnabar Island and Blaine

FAQ

Can you go from Cerulean City to Mt. Moon on Route 4?

No; ledges make Route 4 one-way from Mt. Moon down to Cerulean, so enter Mt. Moon from Route 3 near Pewter City.

Where do you catch Jigglypuff in HeartGold and SoulSilver?

Route 4 has Jigglypuff in the tall grass at a 10% rate in the morning, day and night.

Where is the HP Up on Route 4?

It is on the ledge on the right-hand side of the route.

What Pokémon can you catch in Route 4 in HeartGold and SoulSilver?

12 species: Spearow, Rattata, Jigglypuff, Zubat, Ekans, Arbok, Goldeen, Seaking, Magikarp, Hoothoot, Pineco, Wurmple.

Sources & picture credits

Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances, items, trainers, rematch teams, gifts and shops come from the pret/pokeheartgold decompilation, and the Pokémon sprites and dungeon entrance pictures are drawn from the game’s own graphics in it. The position maps are the Gold/Silver wiki’s Pokégear map renders. Location pictures and trainer sprites © Nintendo / Creatures / GAME FREAK, archived from the Pokémon Wiki on Fandom (listed on the image gallery).