I was just wondering if hidden power affects ghosts since hidden power is a normal type and they don't affect ghosts but hidden power's type is different depending on the pokemon who uses it.
Yep, Hidden Power does hit Ghost types, except for in the case of Hidden Power Fighting.
Check the chart and explanation as to why it cant be normal.
How to change your username
How to add a user avatar
Why was my post hidden?
Flags vs Downvotes
Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.