Sorry, I don't know much about Digimon, but weren't they are variation on Tamagatchi very early on and became it's own thing?

Pretty much, it was supposed to be a more boy-friendly version of it.

Well then why even have Tamagachi represented when Digimon is apart of that.

Although the idea of the black sprite tamagatchi from the original toys fighting ala Mr. Game and Watch would be hilarious to me.

Well there is Nightmare from Soulcalibur since he's the mascot of the Soul series and SC2 on the Gamecube was the best selling version out of the three (thanks to Link being a guest fighter). However I doubt he would make it into Smash.

I feel like a Digimon fighter in Playstation All Stars would have been cool given how the Digimon games on the PS1 where popular. In the late 90's and the early part of the 2000's, Nintendo had Pokemon while Sony had Digimon on their side. However PAS end up doing poorly and they cut all support for the game two years ago.

Because Mametchi is probably more iconic and as I said, has already appeared in a Bandai/Namco collaboration. Bandai Namco would be more likely to push him over a Digimon unless it gets some sort of major surge in popularity.

I wish there was a Playstation All-Stars sequel for the PS4. That game had so many wonky mechanics and so much promise a sequel could really touch up on. Maybe since Sony is rolling in that PS4 money now they could reform the studio that made that game and make a sequel even if the original didn't do well?

I want to see an actual Tamagotchi keychain as a fighter, not the mascot.

Because Pokémon. Pokémon is really why there'll never be a Digimon fighter in Smash.

The reaction if that were to happen the reaction would be similar to Sonic's brawl reveal. :lol

What about--

Yeah. Sonic, Mario's biggest competitor is now a part of the franchise, so having Pokemon's "Rival" (Quotes used because they aren't really competing anymore) wouldn't be outlandish.