This will be my submission for @Scarlet_Captain 's 2022 concept contest entry for unlikely! Also in honor of Kirby’s 30th anniversary!
Source: Kirby game series and Kirby: Right Back At Ya!
Poyo!
The Star Warrior and protector of Planet Popstar is here! Alongside his friends Tiff and Tuff, Kirby is ready to take on any nightmarish monster that crosses him.
Role: Damage
Position: Front
Stars: 
Trial Team: Yellow
Entrance: Kirby, Tiff, and Tuff fly in on the Warp Star and hop off (until Green Skill is unlocked)
Victory: Tiff and Tuff jump for joy as Kirby does his victory dance
Defeat: Kirby gets knocked out and Tiff and Tuff try to get him up
Basic attack: Kirby crouch slides the enemy (with no ability), slashes his sword at the enemy (sword ability), breathes ice at the enemy (ice ability), fires arrows at the enemy (archer ability), punches the enemy
Skills
White Skill: Copy Ability Gain
Fantastic Damage
Passive: At the start of the battle, Kirby starts with no copy ability. If an enemy lands a critical hit on Kirby when he has a copy ability, he loses that copy ability.
Active: The player chooses a copy ability for Kirby to gain. Kirby can choose between Sword, Ice, Archer, or Fighter. When Kirby gains a copy ability, he’ll perform the following with each ability.
Sword: Kirby slashes his sword at the closest enemies five times dealing X damage and knocking them back on the final blow.
Ice: Kirby breaths icy breath dealing X damage to the 3 closest enemies and freezing them for 7 seconds.
Archer: Kirby charges up a shot and fires it dealing X damage to all enemies and have removes all Reflect buffs. Kirby will also retreat to the backline until he changes his copy ability.
Fighter: Kirby charges up a mega force blast dealing X damage to the closest enemy.
If the player chooses the same ability Kirby has, he’ll perform the following skill again. On auto, Kirby will use Sword, then Ice, Archer, and Fighter.
The freeze from Ice and Reflect remove from Archer have a chance to fail on enemies above level X.
Here are what each of the abilities look like.
Green Skill: Warp Star Ride
Fantastic Damage
At the start of combat of every wave, Kirby, Tiff, and Tuff ride the Warp Star through the enemy team dealing X damage.
Tiff can also summon the Warp Star again after they land once every 8 seconds.
Blue Skill: Star Spit
Normal Damage
Tiff and Tuff direct Kirby to inhale the “Most Wanted” enemy dealing X damage to them and then spits them back at the closest enemy dealing X damage and knocking them back.
The “Most Wanted” enemy is also stunned for 15 seconds and is moved to the front after being spit out by Kirby.
Purple Skill: Master of Copy Abilities
Fantastic Damage
When Kirby gains a copy ability from “Copy Ability Gain” he can do the following moves.
Sword: Kirby spin slashes at the closest enemies dealing X damage per hit.
Ice: Kirby encases himself in a ball of ice and rolls through the enemy team dealing X damage and knocking back enemies. This also extends any freezes by 5 seconds.
Archer: Kirby performs a leaping quiver firing arrows at the 3 enemies with the most energy dealing X damage and removing 600 energy.
Fighter: Kirby performs a rising break on nearby enemies dealing X damage and applying Shatter for 6 seconds.
Shattered enemies take 7% of their max hp as True Damage each time they are dealt Fantastic Damage from an enemy.
The energy removal is less effective and Shatter has a chance to fail on enemies above level X.
Red Skill: Right Back At Ya!
When Kirby gains a copy ability from “Copy Ability Gain” he cleanses himself, Tiff, and Tuff and gains 85% damage reduction.
Kirby gains 90 energy when he crits an enemy with any copy ability from “Copy Ability Gain”.
Damage reduction has a chance to fail against enemies above level X.
Additional stat boosts
- +Z basic damage
- +Z skill power
- +Z reality
Friendships
Kirby, Tiff, and Tuff - Lilo
Allies: Mary Sanderson, Mr. Big & Koslov, Ariel
Campaign Name: Nightmare in the City
Disc Name: Fright Ride
Weaken and scare hard-hitting enemies
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max hp
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Damage role enemies lose X basic damage
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Blue Team enemies lose X skill power
Enemies that deal 20% of Kirby, Tiff, and Tuff’s max hp in a single hit are scared for 6 seconds.
Enemies also gain 5 stacks of Weakness for 4 seconds.
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+6 seconds of scaring per star
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+4 seconds of Weakness per star
Kirby, Tiff, and Tuff - Phil
Allies: Simba & Nala, Violet, Shank
Campaign Name: City Warriors
Disc Name: Calling all Heroes
Copy Abilities from “Copy Ability Gain” heal and deal more damage
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skill power
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basic damage
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when Kirby basic attacks with a copy ability, he, Tiff, and Tuff are healed for X hp
Copy Abilities from “Copy Ability Gain” now deal 9% more damage to enemies below 30% of max hp
- +9% per star
Kirby, Tiff, and Tuff/Lilo Friendship Campaign
Kirby, Tiff, and Tuff/Phil Friendship Campaign
Enjoy!