A little reminder is always useful here: things were not quite the same twenty years ago…

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Differences between then and now

Back in the days of Pokémon Yellow, there were only fifteen types: the Dark and Steel types only appeared with Pokémon Gold and Silver and the Fairy type only with Pokémon X and Y. Things were therefore slightly simpler than today. A Pokémon generally had a single type, but dual types already existed.

Among the type matchups themselves, there were few changes afterwards apart from these:

  • The Bug type was super effective against the Poison type (it is “not very effective” today) and vice versa (the Poison type currently has normal effectiveness against the Bug type).
  • The Ghost type had no effect on the Psychic type, whereas it is super effective against it today.
  • The Ice type had normal effectiveness against the Fire type. Today, it is not very effective.

Because the Dark, Steel and Fairy types did not exist, some Pokémon have a different type or no dual type in the first generation.

National Pokémon Current type Type RBY
35 Mélofée Fée Normal
36 Mélodelfe Fée Normal
39 Rondoudou NormalFée Normal
40 Grodoudou NormalFée Normal
81 Magnéti ÉlectrikAcier Électrik
82 Magnéton ÉlectrikAcier Électrik
122 M. Mime PsyFée Psy

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Type chart

A few tips for reading the chart:

  • The types listed horizontally are the attacking types, and those listed vertically are the types receiving the attack.
  • x0: a case where an attack of one type has no effect on a Pokémon of the other type.
  • x1/2: a case where an attack of one type deals half damage to a Pokémon of the other type.
  • x2: a case where an attack of one type deals twice the normal damage to a Pokémon of the other type.
  • Blank cells indicate matchups where an attack has normal effectiveness.

Note that because of dual types, there are double resistances and double weaknesses.

  • If an attack type is super effective against both types of the Pokémon taking it, the damage is multiplied by 4 instead of 2.
  • If, on the other hand, an attack type is not very effective against both types of the defending Pokémon, the damage is multiplied by x1/4 instead of x1/2. In other words, it is divided by 4 rather than 2.
Combat Dragon Eau Électrik Feu Glace Insecte Normal Plante Poison Psy Roche Sol Spectre Vol
Combat x1/2 x2 x1/2 x2
Dragon x2 x1/2 x1/2 x1/2 x2 x1/2
Eau x1/2 x2 x1/2 x1/2 x2
Électrik x1/2 x2 x1/2
Feu x2 x1/2 x1/2 x1/2 x2 x2
Glace x2 x2 x1/2 x2
Insecte x1/2 x2 x1/2 x2 x2 x1/2 x2
Normal x2 x0
Plante x1/2 x1/2 x2 x2 x2 x1/2 x2 x1/2 x2
Poison x1/2 x2 x1/2 x1/2 x2 x2
Psy x1/2 x2 x1/2 x0
Roche x2 x2 x1/2 x1/2 x2 x1/2 x2 x1/2
Sol x2 x0 x2 x2 x1/2 x1/2
Spectre x0 x1/2 x0 x1/2 x2
Vol x1/2 x2 x2 x1/2 x1/2 x2 x0

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