As a subject matter expert in the field of Pokémon, I can provide you with an accurate answer regarding the effectiveness of psychic-type moves against ghost-type Pokémon.

In the Pokémon games, **psychic-type moves are not super effective against ghost-type Pokémon**. Instead, they are not very effective. The type effectiveness chart for Pokémon shows that ghost-type Pokémon resist psychic-type moves. This is because psychic moves, which are designed to affect the mind, do not have a strong impact on beings that are already intangible and ethereal, such as ghost-type Pokémon.

On the other hand, **ghost-type moves are super effective against psychic-type Pokémon**. This is due to the lore within the Pokémon universe, where ghost-type Pokémon are able to use their spectral abilities to bypass the mental defenses of psychic-type Pokémon.

To sum up, the relationship between psychic and ghost types in terms of move effectiveness is as follows:
- Psychic moves are not very effective against Ghost types.
- Ghost moves are super effective against Psychic types.

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It was corrected in Generation 2 when Ghost became super-effective against Psychic. Bug was super-effective on Poison and vice-versa. This was changed so that Bug is now not very effective against Poison, and Poison now does regular damage against Bug. Ice type moves were neutral against Fire type Pok��mon.read more >>