HeartGold Generations areas

Vermilion City

Leads to S.S. Aqua

Surfing

PokémonWhenLevelChance
TentacoolAny time30–3590%
TentacruelAny time3510%

Rock Smash

PokémonWhenLevelChance
DiglettAny time24–3790%
ShuckleAny time32–3510%

Old Rod

PokémonWhenLevelChance
MagikarpAny time1095%
TentacoolAny time105%

Good Rod

PokémonWhenLevelChance
TentacoolAny time2040%
MagikarpAny time2040%
ChinchouAny time2016%
ShellderAny time204%

Super Rod

PokémonWhenLevelChance
ShellderAny time4040%
ChinchouAny time4040%
TentacruelAny time4016%
LanturnAny time404%

Items

Luck IncenseSticky BarbMax Repel · hiddenBig Mushroom · hiddenMax Elixir · hiddenNugget · hiddenCalcium · hiddenStardust · hidden

Trainers · 4

Guitarist Vincent

#232
JolteonLv 45Shock Wave, Quick Attack, Pin Missile, Helping Hand
VoltorbLv 43Shock Wave, Swift, Gyro Ball, Screech
MagnemiteLv 42Shock Wave, Supersonic, Thunder Wave, Magnet Bomb

Leader Lt. Surge

#255

Uses Full Restore, Full Restore, Full Restore

GalvantulaLv 65@ Focus Sash · Sticky Web, Thunder Wave, Electroweb, Bug Buzz
AmpharosLv 65@ Ampharosite · Discharge, Dragon Pulse, Volt Switch, Ice Punch
MagnezoneLv 65@ Leftovers · Supersonic, Double Team, Discharge, Flash Cannon
RaikouLv 65@ Choice Specs · Thunderbolt, Extreme Speed, Volt Switch, Extrasensory
ElectivireLv 65@ Assault Vest · Ice Punch, Power-Up Punch, Thunder Punch, Close Combat
RaichuLv 65@ Life Orb · Nuzzle, Surf, Thunderbolt, Double Team

Gentleman Gregory

#337

Uses Full Restore

PikachuLv 46Discharge, Light Screen, Thunder Wave, Double Team
FlaaffyLv 43Shock Wave, Signal Beam, Charge Beam, Double Team
ElectrikeLv 42Shock Wave, Roar, Thunder Wave, Thunder Fang

Juggler Horton

#396
ElectrodeLv 43Swift, Shock Wave, Screech, Explosion
ElectrodeLv 43Swift, Shock Wave, Double Team, Light Screen
ElectrodeLv 43Swift, Shock Wave, Screech, Rollout