unown's hidden power is simple: it works the same as any other hidden power.
so if your in a cave i think the move's type is dark, on or under water is water,
forest and grassland is grass, on rocky ground of course is ground or rock.
I've played since 2003 and I am still not sure.
Chat with our AI personalities
if you catch all 28 unknown, including the exclamation mark and question mark unowns, the unowns will spell the alphabet and question & exclamation mark unowns i really dont know what they do.
the ruin maniac guuy digs a new tunnel and new unowns come.
you get pregnant
they are Pokemon shaped like letters
If your Pokemon can't learn grass, it's your only hope, but Unown only has one move which is Psychic Hidden Power, so I think Psychic's hidden power is better than Grass.