That I have done below, worked out a rough move set for him.
Why Ryu Hayabusa?
He was in a trilogy on NES games and the trilogy was remade for the SNES (similar to the NES Mario trilogy remade for Mario All Stars). Also he's a bad *** ninja with a cool ninja sword. More obsecure Nintendo characters have been SSB characters in the past. Lucas or Rob or Game and Watch - Remember those? Anyway I think people would enjoy playing as Ryu Hayabusa in SSB Wii U. I think making him like the recent games is a bad idea. He needs to follow his NES roots.
Playing Style
Ryu Hayabusa would be based off his NES style. Sure he does feature in modern games but none of them are on Nintendo and since SSB is mainly for characters featured on games on Nintendo consoles, I think that's fair. And better in a way as NES ninja skills would make for a very good SSB Wii U Character. He is fast, agile, able to climb walls, swing a sword, create a double of himself and let some really cool ninpo (Ninja magic.) His weakness? He is very light weight and is easily flung around a lot. This is evident in the NES games as hits send him flying. And his jump height is average. Not high and not low.
Move Set
I will describe possible moves for Ryu Hayabusa for most button combinations. I'll use GIFs I've made from videos taken from playing the Ninja Gaiden NES games on an emulator. So you can have a visual representation of the moves. This I feel is a better way to understand the character.
A - Dragon Sword
Down + A - I have not thought of a move for this. Possibly just a ducking sword stab.
Left + A or Right + A - Dragon Sword Upgraded
Smash + A - Hard Kick
Up + A - Spin Slash (also works as a recovery move)
Left + A or Right + A while in the air - Aerial Dragon Slash or an Aerial punch/kick (I have GIFs for both options)
Aerial Recovery Move - Spin Slash. This means Ryu has no 2nd jump. Just one jump and the recovery. This is because I feel a 2nd jump with the wall climbing is a little OP.
B- Shuriken
Left + B or Right + B - Windmill Shuriken
Hold B for a few seconds without moving - Create a clone. The clone lasts for a short time (different to NG2) and only does 50% damage but mimics all of Ryu's moves.
http://i.minus.com/i6xLoCB1hF9z1.gif[img]
Up + B - Fire Ninpo
[IMG]http://i.minus.com/iLtrUIQw9Y2U.gif
Down + B - Fireball Ninpo
http://i.minus.com/iyPacuYnL4t2K.gif[img]
Throw - Nothing fancy here, just an average throw.
Block - Ryu parries the enemies moves with his sword
Super special ability from Smash Ball - Art of the Fire Wheels Ninpo (only if Smash Balls exist in SSB Wii U) - Makes Ryu invincible for a limited time and damaging anyone who comes into contact with the Fire Wheel. TO make the ability usable everyone else is slowed quite a lot while this special ability is in effect.
[IMG]http://i.minus.com/ibrytyk1s33bqR.gif
Character Ability - Wall Climbing
http://i.minus.com/i8PeW1omkMGb5.gif[img]
[size=7[b]Stage Possibilities[/b][/size]
Ninja Gaiden 2 NES have a few good options.
Stage 2-1 - Battling on a fast moving train where you can easily fall off.
Stage 2-2 - Having the snow push everyone in all different directions would be interesting.
Stage 3-1 - A stage with a few holes. Pretty ordinary right? But . . . it's completely dark. Only the players and items and the moon can be seen, not the land itself. But every 10 seconds or so a bolt of lightning hits the ground. This injures no one, but it makes the ground visible for a few seconds.
If you want screen shots or GIFs of these pleas let me know and I'll make some.
Conclusion
Not much else to say. What do you think about all of this? All feedback is greatly appreciated.
And it's pretty obvious I am a fan of the original Ninja Gaiden series. Even NG3 which I think is not that good a game. And I do support Ryu to be in the game.[/spoiler]