FireRed and Emerald type chart

For FireRed, LeafGreen, Ruby, Sapphire and Emerald. There are 17 types: no Fairy.

Garchomp
DragonGroundHP

Hit GARCHOMP with Ice for 4× damage. It's super effective!

Moves against Garchomp

Full page
4×
2×
½×
0×
DEF →ATK ↓
½
0
4
½
½
2

Fire moves hit

Super effective
GrassIceBugSteel
Not very effective
FireWaterRockDragon

Fire Pokémon take

Weak to
WaterGroundRock
Resists
FireGrassIceBugSteel
All Fire Pokémon and dual types
2 Super effective½ Not very0 No effectRows attack, columns defend.

What's different here

Steel resists Ghost and Dark. Both deal ½× to Steel here. Since Gen 6 they deal 1×.

Fairy doesn’t exist. Clefairy and Jigglypuff are Normal, and Dragon has no type that’s immune to it.

Type decides physical or special. In Gen 3 every Fire, Water, Grass, Electric, Ice, Psychic, Dragon and Dark move is special, whatever the move is. The other types are physical.