What modern type resistances didn't exist in Gen 1?

Mar. 28, 2016

For example, nowadays Grass/Poison types take neutral damage from Ground attacks because Grss resists Ground. However, in Blue a Diglett’s Dig was super effective on my Ivysaur. Is this a bug, or does Grass actually not resist Ground in Gen I?

Pleaselog inorregisterto add a comment.

These are two damage charts.- Gen 1- Gen 6I’m gonna list some of the more basic changes.- Anything involving the Fairy, Dark and the Steel type is irrelevant in Gen 1- Psychic also resisted all Ghost moves in Gen 1, this was a bug.However, the glitch you witnessed wasone of the, shall we say, uniqueglitches that existed in Gen 1. It happens when a move like Earthquake hits a Pokémon like Venasaur for example. Earthquake hits Poison super-effectively however Grass resists it. This causes an erroneous message to appear. The link explains this more in depth.

Hope I helped!