Back special is admittedly kind of a strange place to find Kikouken, as it makes her fireball of all things a highly difficult move to use in free for alls, especially for casuals (though to be fair they're probably not the target audience for the character). On the other hand, the fact that her fireball is more difficult to execute than others seems pretty intentional, and putting it there would keep that design intent even on a highly simplified input. Doing so also makes the move stand apart from Hadouken, even if they're functionally very similar. Also, I forgot that auto-turnaround isn't a thing in free for alls. We probably can't do side charges for that reason...
That's probably gonna force Spinning Bird Kick to be down up rather than back forward unless they wanted to make things up and do a quarter or half circle motion. Given how Sakurai has treated the fighting game characters though, I don't think that's super likely.
Yeah I completely forgot about fast falling. If we kept the input, command Tensho Kicks would have to go really high to compensate for being forced to fast fall to use it. Alternitivelly, you could make it a down up move like Terry's, but it's fighting for that input with Spinning Bird Kick. Making it a DP input also works, but I'm not sure Sakurai would go for it since it's not from a Street Fighter game. Though...does the down up motion not effectively have the same problem?
100% agree on Hundred Lightning Kicks, though I'll throw in the possibility of also being able to do it as a mashed neutral air.
Overall I think I'll stick to my guns, but as far as the inputs themselves go, my guesses are:
- Kikouken: Half Circle Forward
- Hundred Lightning Kicks: Quarter Circle Forward if it's a special move, or mash A if it isn't
- Spinning Bird Kick: Down (Charge) -> Up
- Tensho Kicks: Down -> Down or possibly DP if they really want it, but down down is proven to not work
- Hazanshu could also reworked to work as an up special causing Tensho Kicks to missing entirely, which has some precedent with it not being in Street Fighter 4 or 5, but would still be a little strange due to how perfect it would be as an up special
- Hazanshu: Quarter Circle Back