Okay, now I’m gonna add an Assist Trophy for each series:

: Red Koopa (Tucks into his shell and spins around the stage, acting the Red Shell item from 64 and Melee)

: Cranky Kong (Plays a music box that shoots explosive barrels, only to blow up when the sequence ends)

: Revali (Enhances everyone’s jump power with Revali’s Gale; this lasts for 20 seconds)

: Adam Malkovich (Disables a random special move from any opponent)

: Kamek (Either makes the summoner Giant or makes the opponent Tiny) or Poochy (Digs up am item and brings it to the summoner)

: Susie Haltmann (Turns every fighter Metal)

: Peppy (Chucks a Smart Bomb at opponents)

: Pokémon Ranger (Draws continuous loops around opponents, instantly K.O.-ing them once their damage passes 100%)

: Mobile Sprout (Walks around and sucks opponents’ state, acting as a platform for the summoner)

: Pico (Hides in the background and attacks opponents with his rifle)

: Sothis (Accompanies the summoner, granting them the power of the Crest of Flames)

: Manhole (Rescues the summoner whenever they’re near the blast zone)

: Medusa (Turns opponents to stone with her eye beams)

: Cpt. Syrup (Steals an opponent’s item and brings it to the summoner)

: Psycho Mantis (Draws nearby items towards him before any opponents can reach them)

: Amy Rose (Slams the ground with her Piko Hammer, which causes earthquakes)

: Swooping Snitchbug (Carries opponents and drops the, near the blast zone)

: Tom Nook (Scatters coins everywhere, so the summoner can have more coins to have earned after the battle. Only appears once per match.)

: Proto Man (Jumps around, attacks with his Buster and defends with his shield)

: Wii Balance Board (Either makes the ground slipper or causes earthquakes)

: Bald Bull (Charges at opponents like a bull and finishes with his Bull Rush)

: Dig Dug (Turns fighters Giant with his pump, reducing their gravity in the process)

: Reyn (Charges at opponents and attacks them with his weapon)

: Chun-Li (Hounds opponents and attacks with Spinning Bird Kick. Finishes with Senretsukyaku and Kikosho)

: Cactaur (Eratically hops around pricking opponents, finishing with its signature 10,000 Needles attack)

: Loki (Hops around throwing his cards, finishing off with charging them for one last powerful rain attack)

: Octotrooper (Rides around inking opponents)

: Mummy (Slowly walks around and wraps up opponents, slowing them down)

: Futaba Sakura (Boosts all the stats of the summoner and their allies)

: Golem (Slowly walks around and chucks boulders at opponents)

: Mumbo Jumbo (Casts a spell that randomly transforms the summoner*)

: Metal Slug (Rolls around and fires lasers and missiles at enemies; takes a ton of damage, exploding upon defeat)

: Hedlok (Latches itself to the summoner’s head, punching when the shield button is pressed)
Misc. Nintendo: Rusty Slugger (Throws several Beastballs at opponents)
Misc. 3rd party: Magician Type-0 (Flies around shooting fireballs, self-destructing upon K.O.)
*The transformations are as follows:
-Giant
-Tiny
-Invincible
-Invisible
-Bunny
-Metal
-Bullet Bill
-Super Leaf
-Superspicy Curry
-Gold
Or he can just turn you into a washing machine, leaving you completely helpless until the transformation wears off in ten seconds or an opponent tosses you off
For each series, add a boss.