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The next batch of CoroCoro information has been posted to Japanese forums and this batch showcases more information on the upcoming games Pokémon X & Y. We have the cover that showcases a new Mega Evolution of Mewtwo as well as Mega Garchomp in the bottom right
Edit @ 10;36:The user with the same ID also posted that the starter evolutions are Gerogashira, Teerunaa, Hariboogu. They're all single typed and Teerunaa, the evolution of Fennekin, stands up. He also lists two fossil Pokémon, Chigorasu which is Rock/Dragon and Amarusu which is Rock/Ice. There is a white dog called Torimian which is Normal-type and a Psychic-type cat called Nyaonikusu which has male and female appearances. It also states that Mewtwo is version exclusive. He also listed the Fairy-type chart. According to this, Fairy is Super Effective on Fighting, Dark and Dragon and not effective on Fire, Poison or Steel. It also states that it is weak to Poison and Steel while resists Fighting, Dark and Bug. It is immune to Dragon. However, as this is not pictured yet, don't take it as 100% confirmed.