Pokémon Red type chart

The 15 types in Pokémon Red and how they match up. Rows are the attacking type, columns the defending type. Generation I has quirks later games fixed: Ghost moves do nothing to Psychic Pokémon, Bug and Poison are super effective against each other, and Ice is only normal damage against Fire.

Atk ↓ / Def →	Nor	Fir	Wat	Ele	Gra	Ice	Fig	Poi	Gro	Fly	Psy	Bug	Roc	Gho	Dra
Normal													½	0
Fire		½	½		2	2						2	½		½
Water		2	½		½				2				2		½
Electric			2	½	½				0	2					½
Grass		½	2		½			½	2	½		½	2		½
Ice			½		2	½			2	2					2
Fighting	2					2		½		½	½	½	2	0
Poison					2			½	½			2	½	½
Ground		2		2	½			2		0		½	2
Flying				½	2		2					2	½
Psychic							2	2			½
Bug		½			2		½	2		½	2			½
Rock		2				2	½		½	2		2
Ghost	0										0			2
Dragon															2

Normal
Fire
Water
Electric
Grass
Ice
Fighting
Poison
Ground
Flying
Psychic
Bug
Rock
Ghost
Dragon

Frequently asked questions

What type is strongest in Pokémon Red?

Psychic: its only weakness is Bug, the Bug moves in Generation I are weak, and a bug makes Ghost moves (which should beat it) do nothing.

Does Ghost beat Psychic in Pokémon Red?

No. It was meant to, but in Generation I Ghost-type moves have no effect on Psychic Pokémon because of a programming bug.