Walk Through Walls cheat:
509197D3 542975F4
78DA95DF 44018CB4
Use it to walk all the way to the south from Floral City to Celadon City.
About the 3 boulders in Fuchsia, someone else already asked that some pages ago.
OK i just went to the net and noticed that Lt. Surge's Pikachu was nicknamed Volty (and is a girl), so the ghost Pikachu that was our new buddy, is a female Pikachu?!
It surely wasn't relevant to the Side Chapter itself, but yeah, if it's a Female Pikachu in the Manga then you can consider it a Female Pikachu too inside that Side Chapter.
How to Catch Darkrai?
I Touch the Coffin in Undeworld, but can't complete Carly Event (as Darksigner)
I barely remember the steps to get the chance of catching Darkrai, so I hope someone comes and correct me if I'm wrong.
1) After touching the coffin in the Underworld, you have to complete the Orange Archipelago's plot normally.
2) Then, after beating the Orange Cup you have to go to the house with a blue roof inside Valencia Island, if you don't see the kid in the bed having nightmares, then go to Valencia Island's Pokémon Center speak with the occultist over there and go to the house.
3) Speak with the parents and the kid.
4) After that go to the 1st Island of the Sevii Archipelago and get into the forest at a certain time of the day (
can't remember which), over there you're gonna find Cresselia.
5) After beating or catching it, you'll get the wing to help the kid. So go back to his house.
6) Once you helped him, Darkrai is gonna leave his body and I think that you battle with him right there. If not, then he's prolly at nighttime inside 1st Island's forest.