The list of people who've participated and who they suggested, from left to right:

A redesigned Virus Mario from the old Return to 2014 4.0. Suggested by @NotJustinWright .

Boshi, as seen in Cabin Fever 2. Suggested by @thatsylveonfurry1225 .

A virus version of @Defectio .

Rotten MLS, as seen in various @MLS_FNAW 's games. Suggested by @lehtind .

Mona, as she appears in Circus Freaks Week 2. Suggested by @TheToastBunny_Productions .

@Mr_Blackjackgerman 's interpretation of the Mario Entity with a magician's outfit.

PppPenny, as seen in Twisted Memories MLS Edition. Suggested by @MLS_FNAW .

Full House Mario, from FNAW High Rollers. Suggested by @Dperk .

Melting Birdo, from Cabin Fever 2. Suggested by @HeisenbergusS .

Demon Waluigi, from Taf 0. Suggested by @Chromosom3 .

@TripleWario as himself. Suggested by @HockeyMaskedGamer .

@MrBerlman1899 's redesigned Virus Yoshi.

@HockeyMaskedGamer as himself. Suggested by himself.

Virus Donkey Kong, from FNAW Trapped Within. Suggested by @TongKui .

FNAW 3 teaser Wario. Suggested by @W851 .

Young Cricket, as seen in FNAW Redone. @CinemaHanwil .

Mario being happy he found his head. Suggested by @ChezRabbit .

@jooja 's interpretation of Virus Wario.

Toad, as seen in Those Nights at Wario's 3: Infinite Cycle. Suggested by @Solar_X .

Boseki, Ra, and Oracle, as seen throughout various @EpicTagey_Games ' games. Suggested by @baharkolahi