Here is 3 things:
1. Xerneas may be reference to the Celtic "Horned god", Cernunnos - god based on a deer (itself from the Latin 'cervus'). On Wikipedia it said: "Nothing is known about the god from literary sources, and details about his name, his cult or his significance in Celtic religion are unknown. Speculative interpretations identify him as a god of nature or fertility" (HELLO, LIFE POKEMON)
Yvetal = Y + Wyvern + Quetzal
2. Look at this (I KNOW IT'S JUST A FAN ART, BUT HOW AMAZING IS THIS!!!)
3. Here is the leak A LONG TIME AGO
Dianshii (ディアンシー) — Possibly a deer Pokémon. It's name could come from deer + fancy + antsy.
Hariboogu (ハリボーグ) — Most likely the evolution of Chespin — Hari (ハリ) comes from pin/needle, boogu (ボーグ) or bogue, is the name of the shell of a chestnut is French. Thanks to belmad for this tip-off!
Gekogashira (ゲコガシラ) — Possibly from gecko + boss. Gashira means either head or boss. Possibly a Froakie evolution.
Borukenion (ボルケニオン) — Probably Volcanyon — likely boruke (ボルケ) from volcano and nion (ニオン) from canyon.
Dedenne (デデンネ) (CONFIRMED REAL)
Horubii (ホルビー) — Likely comes from horu (ホル) to dig + bee. (CONFIRMED REAL)
Nyaonikusu (ニャオニクス) — Probably Meowstick, as mentioned in a previous leak
Burigaron (ブリガロン) — Maybe a blizzard wolf: buri (ブリ) from blizzard (burizaado) + garo (ガロ / 牙狼) meaning fanged wolf. It could also come from garou (餓狼) meaning starving wolf.
Jigarude (ジガルデ) — Is possibly from Jiga (ジガ / 自我), which means ego.
Mafokushii (マフォクシー) — Is possibly an evolution of Fennekin: Mafoxy
Fuupa (フーパ) — fuu (フー) is most likely wind, pa (パ) could be many things.
Gekkouga (ゲッコウガ) — Gekkou (ゲッコウ) means moonlight + ga (ガ) is moth. Literally moonlight moth.
Torimian (トリミアン)
Teerunaa (テールナー) — Possibly related to Gekkouga. Teeru (テール) means tail and runaa (ルナー) means lunar.
WTF??? Mega !!! UNLEASH THE BABY
The Worlds 2013 opening ceremony has revealed Mega Kangaskhan. In its mega form, Kangaskhan has a new ability called Parental Bond that allows both it and its child to attack. This allows Kangaskhan to use the same attack twice in one turn! Thanks goes to our good friend JWittz for the photo!
It was also announced that the Pokemon X and Y soundtrack will eventually be available on iTunes for download. It will be comprised of 220 tracks.