I would love Tiny the Tiger's inclusion, but it would have to be the old classic Tiny.
With his gladiator attire as an alternate or paired with his spear in a super.
A spear? Wasn't it a trident?
N.Tropy would be an awesome character. He could slow down time for his lvl 3, shoot a homing blast for his lvl 1, a buff move where he spins the clock on his chest and temporarily grants himself a speed buff, freezing an opponent in place or temporarily freezing their ability to gain meter, release horizontal/vertical energy pillars, create random platforms out of nowhere to maneuver around, ect.