CoroCoro has released many interesting images and info, including, but not limited to:
*Pokédex sprites (there are 2 of them instead of 1, similar to Pokétch)
*Pokémon that can follow you (confirmed that any one of the 493 Pokémon can follow)
*event Arceus unlocks event where player can catch either level 1 Dialga, Palkia, or Giratina
*event Pichu unlocks event where player can obtain the notched-ear Pichu
*event Jirachi with special moves at level 5: Wish, Confusion, Rest, and Draco Meteor@ Leichi Berry