In SMG4, Bendy is a playful, mischievous, tap dancing demon. He made his first debut in ♫ The Ultimate Smash Bros ♫, in the video he was crushed by a Tetris block. Bendy made a more major appearance in SMG4: BENDY and the SPAGHETTI MACHINE.
In SMG4: Bendy and the SPAGHETTI MACHINE, Bendy is first seen as a cardboard cutout and a later his spaghetti commercial. Bendy would later appear in person as Mario tries to turn on the spaghetti machine and play around with Mario which included pushing things off a shelf that would fall on top of Mario. Eventually, he is led off track with Goofy following him once Mario hid inside the Boris corpse.
Bendy would appear next in the food storage room to surprise Mario, but Mario would kick a bucket of ink toward Bendy, splashing it onto the devil, making him resemble Ink Bendy. This would anger Bendy for getting ink on the walls, floor, and him. Bendy proceeds to go to a pile of poultry and throw them towards Mario, once Bendy successfully hit Mario with chickens, it sent Mario flying straight toward the stove which would cause the stove to turn on and transform the chicken on top of it into a bucket of Kentucky Fried Chicken which would be used for one of the podiums.
Bendy's next appearance was where Mario was getting attacked by ???, Bendy would free Mario from the chair and try saving Mario from ???'s Spaghetti children. Mario, however, wanted to eat the Spaghetti children to which Bendy would disagree too but Mario does so anyway. As Mario proceeds to eat the flying spaghetti Bendy watched Mario eat all the spaghetti and was just amazed. After 30 minutes have passed ??? would check to see if the two were dead, yet to his surprise, a giant plump Mario was sitting at the top. Bendy would then push Mario down the stairs towards ??? effectively knocking him out so he could be used on the podium.
Once the spaghetti machine was on it started to pile up quickly, Bendy would see this and quickly run out of the room will Mario would stare in awe as more and more spaghetti would pile up into a wave of spaghetti which would push him out of the room. Bendy in another room managed to save Mario from the spaghetti wave by quickly slamming the door shut. With the exit spotted Mario attempts to reach the hatch but isn't able to as it was too high up. With little time left Bendy decides to sacrifice his life to save Mario by throwing him up through the hatch all the way to the top. As Mario is approaching the surface Bendy is last seen waving goodbye and thanking Mario for playing with him, the spaghetti wave breaks into the entrance room and encompasses Bendy, possibly killing him.
Unlike his original monstrous counterpart in the game, this Bendy appears more in his cartoonish form with a white face, gloves with three darts on each of them, black shoes, black body, and a white bow tie. He also has a tail.
Bendy at first seems to be someone who's interested in what's going on the spaghetti factory and if he sees someone, he will mischievously play and scare them to death. It is implied that he also hates people who make graffiti as he gets angry when Mario threw paint at him yet he was angry about the paint on the walls. Later in the video, he seems to help like to help people like in his cartoon. And will sacrifice himself to save others. As he rescues Mario from ??? (Bendy and the Spaghetti Machine), and throws him up to the exit hole when the big spaghetti wave gets into the room where the exit hole is.