MCTails was in dev, and I have plenty of plans, actually!
I got like 75% of him coded and was working on his aerial Tail Swipe before progress halted.
Double Jump - Flight.
This is actually altered quite a bit in the following ways:
- Hold-fly.
- Less time to fly.
- Your height comes at the expense of your speed to a point.
Pressing just spin during flight works like SRB2 and gives you speed again, but pressing both Jump AND Spin at the same time cancels the Flight and actually acts also like a sorta double jump. From here you can do basically anything BUT fly again.
Pressing Spin after a jump otherwise performs the Tail Swipe, which sprays out projectiles, gives you a slight height boost, and if you do it into walls, you do a wall bonk that you can fly out of. It also serves as the local Insta-Shield. Holding Spin through it will trigger a Drop Dash.
Custom 1 mid-air triggers a Down Twirl, acting similar to MCAmy's Cyclone Drill in a sense.
You can also air-roll into a similar state to the wall bonk, meaning you can fly out of an Air Roll.
Shields work akin to MCAmy, he ALSO has the usual Dashmode, Super and Hyper plans are in progress, there's potential ideas for a grounded Tail Swipe akin to it's functionality in SA1 whilst having the Rhythm Badge.