I was doing some digging online and apparently IBUKI has one against him, I have never seen it in play though. I started playing Guile and encountered my first unblockable vs. an Akuma and discovered how annoying they are, it seems like there should be some sort of unblockable setup Vs. Honda but maybe wakeup buttslam or ex headbutt can somehow negate them all?
I think very few characters if any have unblockables on Honda. I’m pretty sure Cammy and sakura doesn’t have, and I’m not sure of Ibuki either - I don’t think she has on honda.
The problem is - Honda’s autocorrect headbutts make unblockables quite difficult on honda, so he is generally less affected by them.