List of Pokemon in Stone and Marble

Mega Evolutions

 * Mega Luxray will be Electric/Dark
 * Mega Bisharp will be a sort of a samurai look
 * Mega Rapidash will have an elegant pegasus look and it's pure Fire.
 * Mega Mew still be pure Psychic
 * Mega Ninetales will be Fire/Psychic
 * Mega Arcanine will be pure Fire
 * Mega Vivillion will be Bug/Psychic along with Mega Butterfree
 * Mega Florges will be Fairy/Grass
 * Mega Goodra will be Dragon/Poison
 * Mega Noivern will be still be Dragon/Flying
 * Mega Hydreigon will be Dragon/Steel
 * Mega Raichu will still be Electric
 * Mega Mamoswine still be Ice/Ground
 * Mega Flygon will be Dragon/Bug along with Mega Yanmega.

New Regular Evolutions

 * Masquerain will evolve into a diving bell spider while holding a rain drop.
 * Dragonair's new evolution is a still a serpent with wings. It's Dragon/Water and it evolves while holding a rain drop.
 * Mr Mime's female counterpart Mrs. Mime will level up if it knows Disarming Voice.
 * Dunsparce will evolve into a serpent at level 30 and it's Normal/Ground.
 * Spritzee will evolve into a creepy fairy plague doctor at level 40 and it's Fairy/Dark.
 * Pryroar will evolve into a manticore with a fire stone.
 * Ariados, Ledian, and Jynx will receive evolutions.

Primal Forms

 * Primal Lugia
 * Primal Ho-oh

New Pokemon

 * A monarch butterfly will be Psychic/Bug instead of your usual Flying/Bug but it knows levitate.
 * An asteroid will evolve into a comet. It will be Fire/Ice.
 * A Hooded Pitohui will be Poison/Flying.
 * A cockroach and a flea will be exclusives. The cockroach will be in the Stone version and it's Bug/Dark and the flea will be in the Marble verison and it's Bug/Dark.
 * There are two angels and they're exclusive. The good angel is pure Psychic and it's avaliable in the Marble version. The other one is a evil angel and it's pure Dark. It's only avaliable in the Stone version.
 * A star-nosed mole will be pure Ground.
 * A pink fairy armadillo and it's Fairy/Ground
 * A Solenodon will be a Rattata expy and it will be Normal/Poison
 * Puesdo Legendary will be a Dracolich and it's Dragon/Ghost. The second one is a Komodo Dragon and it's Poison/Dragon
 * A earthworm will be Ground/Bug
 * A fossil will be a  Velociraptor is Rock/Dark
 * A fossil will be a skeleton (A dry bones expy) is Rock/Ghost
 * A dolphin will be pure Water
 * A Beelzebub will be Bug/Dark
 * A mad hatter expy is Poison/Psychic
 * A bedsheet ghost will be Ghost/Normal
 * A magical girl will be female while a magical knight will be male and they're Fairy/Fighting.
 * The first legendary is a Dullahan and it's Ghost/Fairy
 * The second legendary is Dark/Poison