| No# | Name | Best Found Area | Level | Version |
| 001 | Bulbasaur | Start | 05 | Blue or Red |
| 002 | Ivysaur | / | / | / |
| 003 | Venusaur | / | / | / |
| 004 | Charmander | Start | 05 | Blue or Red |
| 005 | Charmeleon | / | / | / |
| 006 | Charizard | / | / | / |
| 007 | Squirtle | Start | 05 | Blue or Red |
| 008 | Wartortle | / | / | / |
| 009 | Blastoise | / | / | / |
| 010 | Caterpie | Route 25 | 08 | Blue |
| 011 | Metapod | / | / | / |
| 012 | Butterfree | / | / | / |
| 013 | Weedle | Route 25 | 08 | Red |
| 014 | Kakuna | / | / | / |
| 015 | Beedrill | / | / | / |
| 016 | Pidgey | Route 14 | 26 | Blue or Red |
| 017 | Pidgeotto | / | / | / |
| 018 | Pidgeot | / | / | / |
| 019 | Rattata | Route 21 | 23 | Blue or Red |
| 020 | Raticate | / | / | / |
| 021 | Spearow | Route 23 | 26 | Blue or Red |
| 022 | Fearow | / | / | / |
| 023 | Ekans | Route 23 | 26 | / |
| 024 | Abrok | / | / | / |
| 025 | Pikachu | Viridian Forest | 05 | Blue or Red |