Fronk

"That's right. Want to know my secret? It's 8-bit yoga."

- Fronk

Fronk is 9-Volt's pet in the WarioWare series. In his first appearance in WarioWare, Inc.: Mega Microgame$!, he goes by the name of Shag in the English version, which is derived from his Japanese name Shaggy. Since WarioWare: Twisted!, however, he has been known as Fronk in English, due to the word "shag" doubling as a vulgar slang term for sexual intercourse in British English.

WarioWare, Inc.: Mega Microgame$!
In WarioWare, Inc.: Mega Microgame$!, Shag appears 9-Volt's third break scene, where 9-Volt pets Shag and causes him to sweat, and Chicken Races, where Shag competes against 9-Volt.

WarioWare: Twisted!
In WarioWare: Twisted!, Fronk has his own set of microgames. Unlike the other characters, they can appear at any point in stages. They must be completed faster compared to other microgames and are signaled to the player with a unique sound.

Game & Wario
In Game & Wario, Fronk hosts the minigame Islands. In Patchwork, the last medium puzzle is based off of him.

WarioWare Gold
9-Volt's pet Fronk appears in WarioWare Gold. He first appears in 9-Volt's story, where he expresses concern over 9-Volt's hatred of math. Fronk, after realizing that 9-Volt has some skill in the subject, then compares math to an RPG. With this comparison, 9-Volt thanks Fronk for "kind of mak[ing] math fun", and offers to give Fronk his dessert as thanks. However, Fronk declines, saying that "an old guy like [him]" should not eat sweet foods, admitting that he turned 1 the previous month and owes his youthful looks to practicing "8-bit yoga". Fronk also appears in the ending of 5-Volt's story.

Additionally, like in WarioWare: Twisted!, Fronk has his own set of microgames, which involve himself and have shorter lengths than the other microgames. However, he does not have his own stage. Instead, Fronk's microgames appear alongside others' microgames, such as in the Dancing Team and Potluck Gang stages. This game marks Fronk's first speaking role, where he has a deep voice. In the Japanese version of the game, like Dribble & Spitz, he speaks in the, a dialect stereotypically associated with fun-loving, boisterous characters.

In Sneaky Gamer, Fronk can enter 9-Volt's room from the door and hum. He also has his own alarm clock.

WarioWare: Get It Together!
Fronk is the only main character from WarioWare Gold to not reappear as a playable character in WarioWare: Get It Together!, though he does appear as a supporting character in 9-Volt's story. After he and 9-Volt get home from school and are put to bed by 5-Volt, 9-Volt leaps out of bed to show Fronk his new Epic Augmented Reality Game. Fronk's enthusiastic reaction alerts 5-Volt to the fact that they are still awake, but they hide in bed and are able to proceed playing once 5-Volt has left. In the Variety Pack game Frenemy Frenzy, Fronk appears to notify players when their character is about to be swapped, bidding them good luck afterwards.

Game & Wario character card
-''9-Volt's pet -Yellow; has colorful friends -Marches to own drum -Can survive three days underwater

WarioWare Gold character cards

 * Rank C – This odd creature is thankful that 9-Volt rescued him when he was lost, but he bristles at being called a pet.
 * Rank B – For such a tiny guy, Fronk gets lots done: cake baking, bike repairing, and hacking. He's good with his hands.
 * Rank A – Fronk adores 5-Volt's pancakes. Ever since he told her, Fronk only gets pancakes as his snacks.