PlayStation All-Stars Battle Royale
Nickelodeon All-Star Brawl
MultiVersus
DreamMix TV World Fighters
Battle Stadium D.O.N
100

How many characters were at the start of the game?

20 characters

100

Before Garfield and Shredder were added in as free DLC how many characters were avaible at the start of the game's release?

20 characters 

100

How many DC characters are playable in the game?

5 DC characters

100

Which Series had the most amount of characters?

Dragon Ball Z

200

How many DLC characters were release?

4 DLC characters
200

How many DLC characters were release?

5 DLC characters

200

How many Looney Tunes characters are playable?

3 Looney Tunes characters

200

3 characters playable in this game would go on and appear in Super Smash Bros Ultimate 2 are playable while one is an assist trophy 

Snake, Simon and Bomberman 

300

With DLC how many characters are playable?

25 characters

300

How many Scooby-Doo characters are playable in the game?

2 Scooby-Doo characters

300

How Many Transformers characters are playable in the game?

2 Transformers characters

400

Who was the third character who was also found in the game's files who was listed as hunter had a character portrait but was not added to the roster unlike Garfield and Shredder who is this character?

Rocksteady from Teenage Mutant Ninja Turtles

500

Who were the two cancelled DLC characters?

Drat from the Legend of Dragoon and Abe from Oddworld