You can catch a Noibat at the Victory Road, Terminus Cave and in someone's Friend Safari, and later evolve it into Noivern starting at level 48.
Alternatively, you can get one via trading.
Pinsir is a Pokemon X exclusive pokemon if you want to obtain one you will need to trade with someone who has X.
In Pokémon X and Y, you can obtain Volcanion through an event yet to be announced.
The Elite Four in Pokémon X and Y consists of:Wikstrom - Steel-type - Klefki, Probopass, Aegislash and Scizor;Malva - Fire-type - Pyroar, Talonflame, Torkoal and ChandelureDrasna - Dragon-type - Dragalge, Altaria, Noivern and Druddigon;Siebold - Water-type - Clawitzer, Starmie, Gyarados and Barbaracle.
You cannot find the Mega Stone for Latios in Pokémon X or Pokémon Y.
Yes You Can Get A Pikachu In Pokemon X and Y.
You cannot obtain Unova Pokemon in Platinum. But, if you know how to code, it is possible to add Black and White Pokemon into your PokeDex, as well as X and Y.
First, reflect the graph of y = x² in the x-axis (line y = 0) to obtain the graph of y = -x²; then second, shift it 3 units up to obtain the graph of y = -x² + 3.
The Legendary Pokemon available in Pokemon X/Y are:Xerneas (X only)Yveltal (Y only)ArticunoZapdosMoltresMewtwoZygarde
By Transferring the Pokemon from your Unova games. That is, unless you can convince someone to trade you theirs.
Pokemon X and Y allow you to obtain one of the gen1 starters alongside your gen 6 starter.
Pokemon X and Y are sold at MSRP of $39.99 (CAD)
At the time of writing, there is no current way to trade or battle with previous generations in Pokemon X or Y. However, in December, Nintendo will be releasing a paid service called Pokemon Bank which will act as Pokemon X and Y's way of trading from previous generations (although this is only limited to Black, White, Black 2 and White 2). It does not appear that there will be any services that will allow you to battle with previous versions, however.