Tim17
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Are we already forgetting Lv. X pokemon came out in the first Diamond and Pearl set? I don't see why it'd be a 3 set wait for Mega pokemon. Especially if the new starters end up having a mega like blaziken does (I don't imagine blaziken being the only starter).
I bet the new starters will have Mega forms too. They just used Blaziken as an example because they're still keeping the final forms of the new starters a secret. And if that IS true then we will probably get mega froakie, fennekin, and chespin in the first set.
no we're not forgetting that, up until BW new mechanics were usually founded in the first couple of sets (if not first, then second). The exception is the BW series where we got EX's in set four.
with that in mind, it's possible they may wait to introduce the new mechanic - mainly to introduce new pokemon from Gen 6 and possibly affect future cycles.
only time will really tell how this will play out - we might see it first set, we might see it later on. Heck, so far the only Mega-Form pokemon shown are form pre-Gen6.....