In Pokémon Red, Blue, and Yellow, Psychic-type Pokémon were weak to Ghost-type attacks in theory only. In practice, the only Ghost-type attack that caused a nonset amount damage was the low powered Lick move, and it was ineffective against Psychic-types. Night Shade causes damage equivalent to the user's level, regardless of the defending Pokémon's type. To further unbalance the system, Psychic-type attacks were super-effective against the three Ghost-type Pokémon (Gastly, Haunter and Gengar) that existed at the time since these Ghost-types have a secondary Poison-type. This was odd considering the comment by a trainer in the Saffron City Gym in Pokémon Red and Blue saying that Psychic-types feared only ghosts and bugs (the comment was fixed in Yellow). The anime also had the roles reversed, with Ghost-types being resistant to Psychic-type attacks. In Pokémon Gold and Silver, the situation was fixed with the creation of stronger Ghost-type moves such as Shadow Ball, pure Ghost-type Pokémon Misdreavus and the addition of the types Dark and Steel, both of which are resistant to Psychic attacks (with Psychic attacks not doing any damage to Dark types).
