in pokemon diamond how do you open the hidden parts of wayward cave and mt. coronet?

also, i was wondering what you get by getting the 10 bonus rounds in a row on the slot machines in veilstone and what you get for catching all the unown (i already got the ! and ? unown). thanks.

i think u get a berry ok remeber the boy u ran into the F chamber now u have 2 keep going 2 his house and bringing him each unknown of the alphabet 4 each unknow u bring him he gives u a unknown alphabet seal 4 your pokeball. did u catch hippotopas in the ruin maniac cave?? well the 2nd part of the wayward cave is a secret in a way it’s under cycling road on your left side you’ll need flash when u go in then use strength 2 move the boulders. it depends on where u are in th game 2 open mt cronet. glad i could help

Row Round Diamond
Row Round Diamond
Row Round Diamond