Meowth! That's right! He would throw explosive coins (Loch and Load shots) and scratch enemies, and for rage meowth would do more damage and stun enemies. His weapon would be the Loch and Load (Spammy and low damage) and also the Eviction notice that would do small damage but speed meowth up on hit.

Donkey Kong, he would mostly just do punches but he would have a very high super jump, his rage should be a banana launcher (a rocket launcher rockets) it would be very fast but it it'll be low damage,also give him a shotgun that shoots coconuts. (his theme is jungle Hijinx)

boss name:black mage
model: http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=231449497

abilities: teleport: teleport to a random player. hold m2 look up and make him like alot of hp
rage/abilities:

1.fire: shoot a fireball Deals fire damage 85,last 2 sec on player.cost 25 rage p.s fireball is from a spell
2.thunder: Deals lightning damage of 30. use a ball of ligthing spell book.cost 50 rage last 3 sec
4.ice: freeze 2 player in front of you for 3 sec.75 rage
5.curse: curse 1 player after 3 second he turn blu.if the blue player tha your curse you gain 10% speed

music/theme: https://www.youtube.com/watch?v=zw_OxMf6mcY

he been on some nintendo game
1.Mario Hoops 3-on-3 on ds
2.final fantasy 1 and 2 in gba
3.final fantasy on the nes

p.s sniper will be black mage with the freedom staff

Cool idea! I will consider it :)

O L I M A R : He could be a generic rage-summon boss, mostly the different pikmin, or even one color pikmin models would be the thing to be the thing to change.

king k rool:his main attack would be his fist and his rage would be his cannon from dkc 2 and i guest a charge attack. instead of just super jumping he could use 10% rage for a huge leap.

Boss Name: Popple.
Model link: I have yet to find one.
Abilities: I believe Popple should be as fast as a Scout and should have a super jump. The super jump would wouldn't make him jump super high but it would be more of a leap than a hight jump, but he would still get some height from the jump. And his main attack would be a punch or he would just throw random projectiles. His damage is reduced when he uses melee attacks.
Rage: His rage could be where whoever he hits, he steals their weapon and gets to use it until his rage is over. It would do more damage and he gets to choose the weapon he wants to steal. However, if he chooses a higher damaging weapon like the Minigun, the rage time is decreased. The person loses their weapon until the rage is over.
Theme: Either from Superstar Saga or Dream Team (keep in mind, this is the main boss theme for every boss.) Here are the links:
https://www.youtube.com/watch?v=T3KWrUpGe_4
https://www.youtube.com/watch?v=bR2lft3cduc

Name: Zelda
https://www.models-resource.com/wii/supersmashbrosbrawl/model/10316/
Shee runs at 150%, he does 170 damage with Saxxy (as her sword from Twilight Princess)
Her rage is "Ocarina Dance" (makes everyone dance to thriller twice) or "The Light Bow" (she gets 7 arrows from a huntsman that does 125 damage with bleeding for 10 seconds) or "Call the Soldiers of Hyrule" (spawns every dead played on blue so they can attack the living, they can only use melee with crits)
Theme is the main Zelda theme
Using the light bow: https://www.models-resource.com/wii/supersmashbrosbrawl/model/3786/

Boss Name: Antasma

Model Link: https://www.models-resource.com/custom_edited/mariocustoms/model/7585/

Abilities: Antasma has a normal super jump and could have the player model of the Spy or Sniper. He would be the same speed as a Scout. His attack would be his fists. His main model is the tall one.

Rage: He has 2 different rages. The first rage allows him to summon clones of him (based on how many people he has killed.) The clones will be weaker and not have a lot of health. This requires 100% rage. His other rage summons Antasmunchies around the map. When he grabs one, he moves faster and does more damage. This effect lasts until his rage is over. This requires 50% rage.
Theme: https://m.youtube.com/watch?v=x7o9odk9Agg

Crash bandicoot
Ability: Spin 20 rage deal 100 damage to close enemies
Rage Ability: Woah 100 rage ghost stun people and play the woah meme but freeze it at the end for another 5 seconds
Woah is love

Sorry I'm late! Here's Bayonetta!

Bayonetta

Model link: https://www.models-resource.com/3ds/supersmashbrosfornintendo3ds/model/13408/ (9 MB)

Alternate Model: https://www.models-resource.com/xbox_360/bayonetta/model/7928/ (6 MB)

Fully Rigged SFM model: https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=592027113 (100 MB!!!)

Weapon: Fists and the Pistol (Fast fire rate, no reload, pitiful damage)

Ability: Super Jump

Rage Ability: Witch Time, this is when everyone gets a NASTY speed penalty for a few seconds, it's like Lucina/Zoroark's rage.

Music / Theme: "Tomorrow is mine" https://www.youtube.com/watch?v=uIBsGM7EIZw

jiggly puff- like saxton but remodeled as jigglypuff, can tp like horseman instead of jump. ability is to summon a dead red to fight for him, but the minions have 20 damage a hit but 1k health, rage slows time but jiggly puff isnt effected by the slowmo and can attack and or walk at regular speed! i think this is a good idea thx in advance

I got a good one for you.

Boss: Mr. L

Model Link: http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=658309689&searchtext=Mr.+L

Weapons:Wrench

Ability:Super Jump

Rage:He has 2 rages, He can either turn some of the Reds into Blu team just like Cresselia's rage, the 2nd could be where he gets a bit of movement speed plus an Uber that lasts around 5-8 seconds. (Maybe the teamswitch can be like 100 rage and the uber maybe 75)

He has 2 lives, he doesn't get anything special until he loses his 1rst life, he gets a Detonator with 10 ammo and the ability to detonate a flare that does around like 150 damage and afterburn does 4 a second. (You can decide how much damage it does, I'm just setting those as either an example or the actual stats for the gun)

Theme: https://www.youtube.com/watch?v=VMrnzsBkRdA&ab_channel=BrawlBRSTMs3X

Skull kid
Teleport, maybe
rage is summon the moon
i don't know any zelda music lmfao

I'll build on that idea, that is if I can find a model.

UPDATE: https://www.models-resource.com/wii_u/supersmashbrosforwiiu/model/9066/

https://www.models-resource.com/wii_u/hyrulewarriors/model/8954/