Steve has several alter-egos in SMG4's videos.

Image Blooper(s) Description
Captain Steve "SM64: ṩṩἔᾗмὄḋᾗᾄʀ 7 (TOAST edition)", "SM64 Bloopers: Shoot to the Observatory in the Sky", "SM64 Bloopers: The Great Yoshi Race.", and "SMG4: The Super Dudes " Steve become a superhero named Captain Steve, which is probably a parody of Captain America.
Howtoprincess-4 "SM64 Guides: Toadsworth's How to - Princess" Steve dressed as a Prince Steve, seen in cameo.
Vtij877 "Super Minecraft 64 Bloopers: Legend of Steve" Steve as an elf/hero, dressed with Link's clothes, he was named Link Steve.
Evil Steve "Sonic the Derphog: The Evilness of Eggman (?)" and "SM64: Meet the Steve" Steve trying to be evil, and wearing a red evil outfit. He was named Evil Steve.
Po Steve "SM64: Weird dots [ Tubby TV ] weird dots" Steve in a Po (red Teletubby) outfit, he was seen walking like an idiot behind Mario. He is named Steve Teletubbie.
President Steve for President "Ssenmodnar 10 (350k Apocalypse Special)" Steve as a candidate for some presidential elections and was named President Steve.
Steve as a police "SM64 Bloopers: Can the Villager come out to play?" Steve got his job as a policeman, he was seen locking down the whole Peach's Castle. He is named Policeman Steve.
FemaleSteveSMG4 "Super Minecraft 64 Bloopers: Legend of Steve, "SM64: ṩṩἔᾗмὄḋᾗᾄʀ 9 - Time travel edition" and "SM64: Meet the Steve" He also has a girlfriend named Female Steve, who appeared in a few bloopers released in the second half of 2014.
Images (6) "Ssenmodnar 6 (New Year's Edition)", "Ssenmodnar 6.64 (100k special QNA Edition)", "The Toadassass-ination", "Meet the Steve" and "2 MILLION FAN COLLABERATION SPECIAL! (SSENMODNAR)" An hybrid of Steve and Dorrie named Steve-Dorrie Hybrid has also made cameo appearances in a few recent videos.
Queen stephe "SM64 Bloopers: Castle Royale" There's also Queen Stephe who looks like Steve but has some girl make-up.
CBFF5E88-7548-46C1-B3F5-6378150FD085 "SM64 Christmas 2015 - Christmas Crazies" Steve in a Turtle suit.
Screenshot (375) "R64: Mario's Road Trip", "SMG4: Mario Goes to the Fridge to Get a Glass Of Milk" Steve in a farmer suit.
Images-10 "SMG4: The Mario Mafia" Steve in a clonetrooper suit, supposed to look like housekeeping.
Steve Guy
Shy Guy Showdown Steve with Jason Voorhee's mask.
Super mario 64 bloopers Boil the Big Bully

Super mario 64 bloopers Boil the Big Bully

Super mario 64 bloopers: Boil the big Bully Steve takes a clothes off.
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