I have a moveset idea.
Jumps: 3 (two in mid-air)
Jump height: Close to Dedede, warranting good recovery
Walk speed: Slightly faster than Kirby
Run speed: About the same as Sonic's walk
Weight: Same as Ness
Attacks
Neutral: Starts with a stab, transitioning into a flurry of thrusts, before ending in a stab. (akin to KRTDL)
Walking: Quick stab.
Tilted up: Upward thrust.
Crouching: Sliding attack. (He can do it in his game, so why not make him unique to Kirby?)
Dash attack: Skids to a halt, with spear in front of self.
Standard air: Spins horizontally while holding spear out.
Forward air: Three quick stabs in front of self, one diagonal up, one straight, one diagonal down.
Back air: Stab behind self, similar to Shulk's back air.
Up air: Hold spear above self while spinning.
Down air: Spear drop, taken from KRTDL, a quick falling attack with Spear under self.
Forward smash: Swings spear from his left side to his right side.
Up smash: A powerful upward thrust.
Down smash: A spinning attack similar to, but weaker than, Shulk's down smash.
Pummel: Stabs quickly with spear.
Forward throw: Sweeps spear upward, tossing opponent forward.
Back throw: Spins around and tosses a spear with opponent attached.
Up throw: A simple toss.
Down throw: A weaker but faster version of Ike's down throw.
I also want to point out (pun intended) that each attack with his spear will do more damage with the tip than the handle.
Special: Shuriken Throw. (Remember that minigame from KRTDL? Wher you throw stars at targets? Yeah, just throw a shuriken, nearly no one else does it yet)
Side Special: Spear Toss (It's his dash attack in KRTDL, so since he has to be moving to activate it, make it his side special)
Up Special: Waddle Copter (Good recovery and attack strength, but enters helplessness if injured by any attack, even Fox's Blaster (use with caution))
Down Special: Scope Shot (The other minigame in KRTDL, he grabs a Super Scope, charges it, and fires. It can be aimed, but no rapid fire.)
Final Smash: Megaton Punch (Throws a large spear forward. Anyone hit by it is taken to the Megaton punch arena. You then try to match up the circles just like in Megaton Punch. If you match them all perfectly, one hit KO.)
Taunts:
Up: Sits down and bobs his feet on the ground.
Down: Turns toward screen and waves.
Side: Puts hand on forehead and looks around, as if looking into the distance.
All of these taunts are things Waddle Dees do, with the exception of Down, which is something Bandana Dee does in KTD.
That's my idea.