Commonly Missed Trainers
- Lass Lucy (50 EXP): Below the entrance to Diglett’s Cave
- Hiker Hitch (40 EXP): Below the entrance to Diglett’s Cave
- Camper Hank (50 EXP): To the right of the entrance to Diglett’s Cave
- Lumberjack Jack (50 EXP): To the right of the entrance to Diglett’s Cave
- Swimmer Maisy (50 EXP)
- Swimmer Adriana (50 EXP)
Route 16 NPCs (Near the gate to Celadon City):
- Biker Leo (100 EXP)
- Biker Hideo (100 EXP)
- Biker Ruben (100 EXP)
Route 17 NPCs (Cycling Road):
- Cue Ball Koji (100 EXP)
- Biker Virgil (100 EXP)
- Biker William (100 EXP)
- Biker Jaxon (100 EXP)
- Cue Ball Jamal (100 EXP)
- Cue Ball Luke (100 EXP)
- Cue Ball Zeek (100 EXP)
- Biker Nikolas (100 EXP)
- Cue Ball Corey (100 EXP)
- Cue Ball Isaiah (100 EXP)
- Cue Ball Camron (100 EXP)
- Biker Billy (100 EXP)
- Cue Ball Raul (100 EXP)
Route 18 NPCs (Near the gate to Fuchsia City)
- Bird Keeper Ramiro (100 EXP)
- Bird Keeper Wilton (100 EXP)
- Bird Keeper Jacob (100 EXP)
- Black Belt Hideki (100 EXP)
- Black Belt Mike (100 EXP)
- Black Belt Hitoshi (100 EXP)
- Black Belt Aaron (100 EXP)
- Black Belt Koichi (150 EXP)
Route 21 NPCs
- Swimmer Dean (100 EXP)
- Swimmer Melissa (100 EXP)
- Swimmer Jack (100 EXP)
- Fisherman Claude (100 EXP)
- Fisherman Ronald (100 EXP)
- Swimmer Jerome (100 EXP)
- Fisherman Wade (100 EXP)
- Swimmer Roland (100 EXP)
- Fisherman Nolan (100 EXP)
- Swimmer Spencer (100 EXP)
Pallet Town NPCs
- Lass Lil (40 EXP): Below Pallet Town
- Lass Louise (40 EXP): To the left of the surf path below Pallet Town
- Sneaky Sam (40 EXP): Above Lass Louise
- Boarder Brice (65 EXP)
- Skier Cady (65 EXP)
- Boarder Shaun (65 EXP)
Quests
Root of Evil (4,000+ EXP)
This quest can be completed after you have defeated the Kanto Elite Four. This will yield several trainer levels worth of EXP on top of unlocking a lot of daily content to earn even more.
Copycat’s Doll (200 EXP)
This quest can be completed once you have reached Saffron City. It gives 200 EXP and is a requirement for the Harry Potter quest in Johto.
Power Plant (100 EXP) / Power (350 EXP)
The two quests in here can be completed once you defeat Koga in the Fuchsia City gym and obtain the HM03 Surf. There is also the Bossman Burglar NPC that can be battled daily within the Power Plant’s basement for 155 EXP.
Summary
There are a bunch of other guides for daily content and bosses to earn lots of EXP per day. After completing the story, clearing any missed quests or trainers listed here and completing a few daily activities, you will be able to reach Kanto level 80 in a very short amount of time.