I can come up with a unique moveset for Yarn Yoshi in my Smash Bros. Eternity: (6th game after Ultimate on Nintendo Eclipse, it's pretend)
Tagline
"Yarn Yoshi stitches up!"
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Jabs and Tilts
Jab: Does a punch
Rapid: Several punches/kicks before finishing off with a tail swipe
Up: Flicks his tongue upwards
Down: Flick his tongue on the ground
Side: Does a headbutt
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Smash Attacks
Side: Yarn Poochy rams into the opponent
Up: Summons geysers of water as Mermaid Yoshi
Down: Tail swipe
Dash: Charges into the opponent as Moto Yoshi
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Aerials
N-Air: Twirls around as Umbrella Yoshi
B-Air: Three tail swipes
F-Air: Lashes out his tongue
U-Air: several upside-down kicking
D-Air: Propeller Kick
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Specials
Neutral: Tongue Entangle
Side: Moto Yoshi
Up: Umbrella Yoshi
Down: Yarn Hammer
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Grabs and Throws
Grab: Grabs the opponent with his tongue
Pummel: Constricts the opponent
Forwards: Throws the opponent away
Backwards: Kicks the opponent away
Up: Spins the opponent on top as Umbrella Yoshi before throwing them upwards
Down: Turns into Moto Yoshi and runs the opponent over doing donuts
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Final Smash
Sky-Pop Yoshi
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Alts (Alts 3/4/5/6 are Nintendo Characters you can use with Amiibo in Woolly World.)
1. Normal
2. Poochy
3. Mario
4. Kirby
5. Link
6. Samus
7. Plastic
8. Platinum
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Kirby Hat
Same as Yoshi but woolly instead. (Kirby becomes woolly when donning this.)
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Boxing Ring Title
Cottony-soft Bruiser (Reference to the title of this page/thread.)
Still under construction