Type · #120
Bug
Super effective (x2) against: Grass, Poison, Psychic. Not very effective (x1/2) against: Fire, Fighting, Flying, Ghost. Super effective on Grass, Poison and Psychic - but the only decent Bug moves in Gen 1 are Twineedle and Pin Missile, so Psychic stays unpunished.
Spatial guide
Kanto Atlas
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Type Of
Which elemental type or types something has.
Effective Against
The Gen 1 type chart: which type's moves deal extra or reduced damage against which other type. Rendered as a 15x15 grid with attacking types as rows and defending types as columns. Only non-neutral cells are stored; every other cell reads as grid_default (1.0, neutral). Gen 1 differs from every later generation in several of these cells (see the per-row comments below).
Full Effective Against chartWeak To
The Gen 1 type chart: which type's moves deal extra or reduced damage against which other type. Rendered as a 15x15 grid with attacking types as rows and defending types as columns. Only non-neutral cells are stored; every other cell reads as grid_default (1.0, neutral). Gen 1 differs from every later generation in several of these cells (see the per-row comments below).
Full Effective Against chart