Quoted By:
>New 'Earth' type
>All existing Rock and Ground type Pokémon and moves merge into Earth
>Pokémon like Hippowdon and Gigalith become Earth type; Pokémon like Golem and Rhyperior become pure Earth types; Aerodactyl would become Earth/Flying and Swampert would become Water/Earth.
>All Earth Pokémon receive a 50% Special Defense boost under Sandstorm, like Rock types normally do
Immunities:
>Earth is immune to Electric; Flying is immune to Earth
Resistances:
>Earth resists Earth, Normal, Fire and Poison; Earth is resisted by Earth and Grass
Weaknesses:
>Earth is weak to Grass, Water and Ice; Earth deals supper effective damage against Fire, Electric, Poison and Steel
Also in a lesser note, would Rock and Ground types being the same type make sense to you? It always seemed redundant to me.