I think I have ideas on how Tails would work
Similar to SSF2, but with changes
Down Special: Hyper Spin-Dash?(What it lacks in power it makes up for in speed)
Side Special: Boxing Glove-on-a-Chain(Also used in his Up/Down Smashes[Tails whips it forward, dealing low damage but high knockback])
Final Smash: Cyborg Tails(See image i posted earlier[All attacks are same but buffed, with the execption of Hyper SpinDash, which changes into a landmine toss, The Final Smash itself lasts for 20 seconds])
Rest in SSF2