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LegoGuy77777 is a minor youtuber in the SMG4 series.
He made a few videos on the video game Roblox.
LegoGuy77777's color code may be based on the LEGO characters (hence his pseudonym), who usually have yellow skin. It can also mirror MarioMario54321's because of the colours used. Most of the shades are very marked. He Has LEGO Colors.
Note: This list may be incomplete.
LegoGuy77777 mostly appeared in the Ssenmodnar series.
In this video, he's seen waiting outside the toilet room of the Princess Peach's Castle while another guy is pooping for several hours.
In this episode, he comes in the piano room of Big Boo's Mansion, but then hears the Dr. Dr. Eggman's voice saying "PINGAS!", and then gets afraid.
He makes a cameo appearance with other people in this blooper.
He makes a cameo appearance with two other citizens scared and stormed by the evil Ztar.
He appears as a customer, but a Spaghetti Monster bites his head off.