>>21293495I'd talk about personal experience, because hardly any of my friends either know about Blaziken or if they do know about him, they don't like it much. But that's just personal experience.
A much better meter for its state would be the internet. And what the internet tells me is the same story my friends tell me: Even Greninja is more liked than Blaziken. Chicken didn't even reach #1 in its respective poll
http://www.dorkly.com/toplist/55753/the-greatest-generation-iii-pokemon-of-all-time-vote-now unlike Greninja
http://www.dorkly.com/toplist/56792/the-greatest-generation-vi-pokemon-of-all-time-vote-now. Greninja lands way more hits on Google and actually beat out the Blaziken tag on Pixiv in less than a year compared to KFC's 11+ years of existence, pic related. Not to mention the Smash 4 appearance.
I started on Gen III, and although i never disliked Blaziken (thoguh Swampert is my fave), i didn't see much love for it until Gen V introduced HA's. Just because i don't like something doesn't mean it isn't popular, the inverse is also true. Maybe i just didn't follow it properly, but i never actually saw Blaziken be REALLY popular