Here's an incomplete list of first party ATs I think should be in. Blue ones are new. "???" are slots that need to be filled.
MARIO
Hammer Bro.
Lakitu & Spiny
Rosalina: Summons falling starbits that heal you by 1% each but there are a lot.
Fawful: Creates a large purple gas cloud that increases your damage when inside.
???
DONKEY KONG
Rambi: Charges across the stage once. Easy to dodge but can KO you easy if hits.
Squawks: Flies around coughing dangerous eggs. However the last one is the Egg item.
ZELDA
Midna:
Skull Kid: Replaces Tingle's AT. He plays his song and summons random effects.
Phantom: A bad assist trophy that targets the summoner. Can be killed by attacking its back.
???
METROID
Metroid
???
???
YOSHI
Poochy: Digs up random items but occationally finds Cards and CDs.
KIRBY
Knuckle Joe
Kracko: Flies around shooting bolts beneath him.
???
STAR FOX
Andross
???
???
MOTHER
Jeff
Eve
Starman
FIRE EMBLEM
Lyn
???
???
OTHER
Kat & Anna
Mr. Resetti
Dr. Wright
Excitebikes
Devil
Infantry and Tanks
Helirin
Jill and Drill Dozer
Nintendog
Barbara
Eggplant Wizard: Tosses eggplants around that give you the "Eggplant Curse"Eggplant Wizard: Tosses eggplants around that give you the "Eggplant Curse"
Doc Louis: Gives random advice, when attacked he rips off his shirt to reveal his lepard suit and hunts you down with a Star Punch.
Starly: Replaces Starfy's assist trophy.
Golden Sun Assist: Not familiar with this series.
Lip: Drops three large blocks on the stage.
Takamaru: Replaces Goroh and slices about the stage.
Dog & Ducks: Dog sniffs around then jumps into the background to scare out ducks. A cursor will appear that will shoot for the ducks and players. If the cursor doesn't hit anyone the dog will come out and laugh.
Muddy the Mole: Pops out of the dirt and rolls giant iron balls to roll you over.
Captain Rainbow: Runs about shooting his yo-yo at people.
???: More to see.
MARIO
Hammer Bro.
Lakitu & Spiny
Rosalina: Summons falling starbits that heal you by 1% each but there are a lot.
Fawful: Creates a large purple gas cloud that increases your damage when inside.
???
DONKEY KONG
Rambi: Charges across the stage once. Easy to dodge but can KO you easy if hits.
Squawks: Flies around coughing dangerous eggs. However the last one is the Egg item.
ZELDA
Midna:
Skull Kid: Replaces Tingle's AT. He plays his song and summons random effects.
Phantom: A bad assist trophy that targets the summoner. Can be killed by attacking its back.
???
METROID
Metroid
???
???
YOSHI
Poochy: Digs up random items but occationally finds Cards and CDs.
KIRBY
Knuckle Joe
Kracko: Flies around shooting bolts beneath him.
???
STAR FOX
Andross
???
???
MOTHER
Jeff
Eve
Starman
FIRE EMBLEM
Lyn
???
???
OTHER
Kat & Anna
Mr. Resetti
Dr. Wright
Excitebikes
Devil
Infantry and Tanks
Helirin
Jill and Drill Dozer
Nintendog
Barbara
Eggplant Wizard: Tosses eggplants around that give you the "Eggplant Curse"Eggplant Wizard: Tosses eggplants around that give you the "Eggplant Curse"
Doc Louis: Gives random advice, when attacked he rips off his shirt to reveal his lepard suit and hunts you down with a Star Punch.
Starly: Replaces Starfy's assist trophy.
Golden Sun Assist: Not familiar with this series.
Lip: Drops three large blocks on the stage.
Takamaru: Replaces Goroh and slices about the stage.
Dog & Ducks: Dog sniffs around then jumps into the background to scare out ducks. A cursor will appear that will shoot for the ducks and players. If the cursor doesn't hit anyone the dog will come out and laugh.
Muddy the Mole: Pops out of the dirt and rolls giant iron balls to roll you over.
Captain Rainbow: Runs about shooting his yo-yo at people.
???: More to see.