>>52398956>>1-per-battle superbuffRight, just like many other abilities and items.
>>restricted to a handful of speciesWhich isn't the case for any of the gimmicks
>>tied to l o r e of KalosNo more than Hidden Abilities are tied to the lore of the Dream World
>>activated by key item (limited edition)Like any of the forms introduced in Platinum? Yeah. Exactly.
>>shilled in promo material for 3 yearsHow new are you? Do you not know what a new feature is?
>>abandoned after 2 games as [other] gimmicks took center stageThis might be a surprise to you but the games in a generation aren't all identical. I know that's hard to understand for someone that hasn't actually played them but XY, ORAS, SM, USUM, and LGPE are all distinct games that spanned across a time period of over 6 years in the series with Megas being used even more afterwards in promotional material. Even if you ignore the shit ton of balance tweaks and lore they got in Gen 7 you can't really ignore just how relevant they are and the prominence of Iron Valiant / Roaring Moon over the other non-mega paradoxes.