Change into the following forms by performing the corresponding tasks:
FORM - HOW TO EVOLVE Arceus - Give a plate to Arceus to have it change form. Deerling or Sawsbuck - Deerling or Sawsbuck will change into their Spring, Summer, Fall, Winter forms depending on the current season based on the system time. Deoxys - Examine the meteor in the museum in Nacrene to cycle through Deoxys' Normal, Attack, Defense, and Speed forms Eevee - Fight enemies near the moss-covered stone in Pinwheel Forest to evolve into Leafeon. Fight enemies near the frozen ice crystal at the bottom of Twist Mountain to evolve into Glaceon Feebas - Trade Feebas while it is holding a Prism Scale (obtained on Route 13) to evolve into Milotic. Giratina - Give Giratina a Griseous Orb from the Shadow Triad on the Marvelous Bridge to change into its Origin form. Karrablast and Shelmet - To evolve Karrablast and Shelmet, trade one for the other with another player. The Karrablast will evolve into Escavalier and the Shelmet will evolve into Accelgor. Magneton - Fight enemies in Chargestone Cave to evolve into Magnezone. Nosepass - Fight enemies in Chargestone Cave to evolve into Probopass. Rotom - Open the boxes in the first door on Floor 1 of the Shopping Mall Nine to change into Rotom's Normal, Heat, Wash, Frost, Fan, and Mow forms. Shaymin - Give a Gracidea (from the woman in the Pokemon Center in Lacunosa Town) to Shaymin to change it into its Sky form.