WarioWare, Inc.: Mega Microgame$!
5-Volt (though not named such) is first mentioned in the diary section of the WarioWare, Inc.: Mega Microgame$! Japanese website. In his diary, 9-Volt writes that Wario gave his mother a Game Boy Advance SP for her birthday, which pleased her as she is an avid gamer. According to the entry, 5-Volt's birthday is on March 13.
5-Volt makes her first in-game appearance in WarioWare: Twisted!, where she shouts at 9-Volt to go to bed since he is playing with 18-Volt all day. 5-Volt is seen only from behind and from the knees down. After 9-Volt has gone to bed, he still furtively plays with his Game Boy Advance SP under the bedspread, but she catches him when she opens his room's door a second time and demands him to put his game away. 5-Volt's silhouette is seen in the doorway.
Game & Wario
5-Volt is seen again in Game & Wario, during the Gamer stage. This is the first game to show her face completely. She often drops by 9-Volt's room to check if he is sleeping, and the player must pause 9-Volt's console while she looks at him. She also can attempt fake-outs, as well as be seen on-screen twice at the same time.
In the cutscene before the game, she appears to take the game 9-Volt and 18-Volt are playing and orders them to do their homework. Once they finish she returns the game to them. They both find out, in surprise, that 5-Volt has beaten their high score, specifically with a score of 100.
5-Volt reappears in WarioWare Gold, now with her own set of microgames. Specifically, she hosts the fifth stage of the Mash League, while her theme is Nintendo Classics, just like her son and 18-Volt. Like the other characters, she has received a slight redesign to match the game's art style. She now wears a long-sleeved red hoodie under a yellow apron. Her eyes are now distinctly brown, and her bangs are thicker.
In her story, 5-Volt realizes 9-Volt will be home soon, so she decides to start making dinner. However, a muscular man appears on television, and promotes his new bodybuilding techniques, with 5-Volt determined to try them out. Later on, 9-Volt comes home and accidentally drops his Nintendo 3DS behind a cupboard. However, using her newfound powers, 5-Volt lifts the cupboard, amazing her son.
5-Volt is also part of the Ultra League Story. She starts a cookout known as a potluck in Peridot Campgrounds along with her son, Dribble, Spitz, Ashley, Red, 18-Volt, Orbulon, Mike and Fronk, who presented their microgames along with her own. It starts well until Orbulon brings radioactive carotene logs, Red brings explosive oysters and Ashley brings a mandrake root, which makes Spitz scream like a mandrake as a prank on Red. To make the potluck not completely ruined, 5-Volt hosts a card game for everyone to play. Due to the card game being very successful, she decides to have another potluck tomorrow. She also decides to invite Wario to join the second potluck. By the end of the game, after Wario attempted to take the money that was supposed to be part of her rate and the others that worked on his games, she told Wario not to fake his punishment and took pictures of him getting spanked by Young Cricket, assuring him that he will be fine. Since Wario spent a majority of their rate, 5-Volt along with the others took what was in his suitcase, with the player receiving the 10000 coins that they used to buy their admission into the Wario Bowl.
5-Volt also reprises her role in the mode Sneaky Gamer, a remake of the Gamer mode from Game & Wario.
WarioWare: Get It Together!
5-Volt appears in WarioWare: Get It Together! as a playable character. As a playable character, she teleports by creating a ghostly apparition of herself while in a state of deep sleep and transfers her physical body to wherever she needs to be, creating a shockwave in the process. This process causes her to temporarily take on the angered form that she appears in as seen in both Gamer and Sneaky Gamer. However, she cannot teleport into walls or solid objects nor can she leave a waiting area in between microgames, which is identified by her ghost's eyes closing or a red slash over the cloud.
In the game's story, 5-Volt is transported into the latest game created by Wario and the other members of WarioWare Inc. by the Supreme Developer to deal with the game bugs created as a result of Wario's negligence, and is recruited in the Remix 2.0 section of Story Mode. 9-Volt is concerned about boarding the mine cart when he realizes who might be in it and suggests a different way to cross, causing 5-Volt's ghostly form to follow him and warp over, scaring her son. She scolds him for wandering away by himself, before admitting that getting upset makes her very tired, revealing her ability. Jimmy T asks what is going on with her, to which 9-Volt explains that, while she is unconscious, 5-Volt is capable of out-of-body experiences and uses that power to keep an eye on things.
5-Volt is also present in the introduction to 9-Volt's stage. After seeing 9-Volt go to bed, she comments on how adorable her son is before leaving the room, allowing 9-Volt and Fronk to show off his new "Epic Augmented Reality Game". Fronk's over-eagerness, however, causes 5-Volt to return, forcing the pair to hurry back to bed and pretend they are both asleep as she similarly gazes at them to her behavior in Gamer and Sneaky Gamer before leaving once more.
Super Smash Bros. series
Super Smash Bros. for Wii U
5-Volt appears as a stage hazard in the Gamer stage of Super Smash Bros. for Wii U, appearing from the bedroom door, the window, or the television, just like in Game & Wario. Also, if there is a sketchbook or a game console on the stage, she can appear from there. Before she appears, there is a subtle audio cue. There are also fake-outs in the stage including a cat, an old man wearing a wig, an empty door, 5-Volt turning upside down (at the window), or a TV channel with a hand making a gesture. Additionally, 5-Volt may double-check the area by entering through the door multiple times or, when at the window, backing up and rechecking. Finally, with a different audio cue, 5-Volt may exit the TV and scan the entire table from right to left and back. If players are within 5-Volt's sight when she appears, they are knocked away as if they were hit by a strong attack. Players can avoid 5-Volt by avoiding her light, using the stage elements as cover.
Super Smash Bros. Ultimate
5-Volt reprises her role as a stage hazard in the Gamer stage. She now appears as an enhanceable, neutral Primary-type Advanced class spirit. When she is level 99, she can get upgraded to an angry version of herself, who is an Ace-class spirit.
Profiles and statistics
Game & Wario character card
-9-Volt's mom (age unknown)
WarioWare Gold character card
WarioWare: Get It Together! character description
Super Smash Bros. series
Super Smash Bros. for Wii U trophy
Super Smash Bros. Ultimate spirits
Names in other languages