Pokémon Red Version, Blue Version, and Yellow Version - Type Matchup Chart
Attack types are the rows; Pokémon types are the columns. If a Pokémon has two types, the type matchups from both types are multiplied.
| Attack Type | NOR | FIG | FLY | POI | GRO | ROC | BUG | GHO | FIR | WAT | GRA | ELE | PSY | ICE | DRA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NORMAL | 1x | 1x | 1x | 1x | 1x | 1/2 | 1x | 0 | 1x | 1x | 1x | 1x | 1x | 1x | 1x |
| FIGHTING | 2x | 1x | 1/2 | 1/2 | 1x | 2x | 1/2 | 0 | 1x | 1x | 1x | 1x | 1/2 | 2x | 1x |
| FLYING | 1x | 2x | 1x | 1x | 1x | 1/2 | 2x | 1x | 1x | 1x | 2x | 1/2 | 1x | 1x | 1x |
| POISON | 1x | 1x | 1x | 1/2 | 1/2 | 1/2 | 2x | 1/2 | 1x | 1x | 2x | 1x | 1x | 1x | 1x |
| GROUND | 1x | 1x | 0 | 2x | 1x | 2x | 1/2 | 1x | 2x | 1x | 1/2 | 2x | 1x | 1x | 1x |
| ROCK | 1x | 1/2 | 2x | 1x | 1/2 | 1x | 2x | 1x | 2x | 1x | 1x | 1x | 1x | 2x | 1x |
| BUG | 1x | 1/2 | 1/2 | 2x | 1x | 1x | 1x | 1/2 | 1/2 | 1x | 2x | 1x | 2x | 1x | 1x |
| GHOST | 0 | 1x | 1x | 1x | 1x | 1x | 1x | 2x | 1x | 1x | 1x | 1x | 0 | 1x | 1x |
| FIRE | 1x | 1x | 1x | 1x | 1x | 1/2 | 2x | 1x | 1/2 | 1/2 | 2x | 1x | 1x | 2x | 1/2 |
| WATER | 1x | 1x | 1x | 1x | 2x | 2x | 1x | 1x | 2x | 1/2 | 1/2 | 1x | 1x | 1x | 1/2 |
| GRASS | 1x | 1x | 1/2 | 1/2 | 2x | 2x | 1/2 | 1x | 1/2 | 2x | 1/2 | 1x | 1x | 1x | 1/2 |
| ELECTRIC | 1x | 1x | 2x | 1x | 0 | 1x | 1x | 1x | 1x | 2x | 1/2 | 1/2 | 1x | 1x | 1/2 |
| PSYCHIC | 1x | 2x | 1x | 2x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1/2 | 1x | 1x |
| ICE | 1x | 1x | 2x | 1x | 2x | 1x | 1x | 1x | 1x | 1/2 | 2x | 1x | 1x | 1/2 | 2x |
| DRAGON | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 1x | 2x |