Pokemon Form Changing in HG/SS if you didn't know

In HG and SS form changing is back.

Deoxys - just east of Pewter City in Kanto there are 4 meteorites

Rotom - have rotom lead your party then go to Silph Co. Headquarters in Kanto. Rotom will power up the elevator and you will go to a level where you can change its forms (and you don't need an item just rotom)

Shaymin - take a fateful encounter shaymin to the flower shop in Goldenrod city, Jhoto, and you will receive a Gracidea (key item) allowing Shaymin to change to Sky Forme. The movie enevt shaymin and oak's letter Shaymin are both 'fateful encounters'.

Giratina - IF U HAVE THE MOVIE EVENT ARCEUS OR THE HALL OF ORIGIN ARCEUS go to Runis of Alph. south of Violet City, Jhoto, and go to the first building u see. a man will bump into u and take u underground where u will transport to Shinjo Ruins. There u will meet a hiker, go to his house and drop off all your pokemon except for arceus. Go to the ruins and you will meet Cynthia, then choose either palkia, dialga or giratina and u will get them at lvl 1. Palkia holds the lustrous orb, dialga holds the adamant orb and giratine the griseous orb which allows giratina to change from Origin form to alternate form and vice versa. Also these lvl 1 legendary dragons will also learn a completely new move... Palkia - Hydro Pump, Dialga - Meatl Burst and Giratine - Shadow sneak

DON'T TRY TO TRADE A GIRATINA HOLDING A GRISEOUS ORB FROM YOUR PLATINUM TO YOUR HG/SS BECAUSE APPARENTLY IT GETS TAKEN OFF GIRATINA.

And yes it is true you can visit the shinjo ruins twice with the movie arceus or hall of origin arceus.

Happy pokemon form changing

5P33D5

Yes i have done all of these except for the second trip to Shinjo ruins

Thank you for posting this it was very helpful. Thanks and Good Job!