“You just saved me like a hero! You're a hero, aren't ya? You're the coolest!!!” —Watt, Paper Mario
Watt is a baby Li'l Sparky and Mario 's sixth party member in Paper Mario. In Super Paper Mario, Watt appears as a Catch Card found on the seventieth floor of the Flopside Pit of 100 Trials. Although she is female (if Li'l Sparkies can be said to have any true gender), Watt is mistakenly referred to as male during her Super Block upgrades and on her Super Paper Mario Catch Card. Although Watt's age is unconfirmed, it would appear that she is a young child because of her pacifier. Her Super Paper Mario Catch Card description also implies that she is young.
Mario finds Watt while traveling through Shy Guy's Toy Box. He eventually comes to a dark room inhabited by the Big Lantern Ghost. The battle against the ghost involves attacking the lantern he carries to make the room brighter, and after his defeat Mario can break open the lantern and find Watt inside.
Watt explains to him that the Big Lantern Ghost had kidnapped her and trapped her in the lantern. She tells Mario that she heard some of the Shy Guys talking about him, and she volunteers to join him and his party on his quest. Watt's field ability allows Mario to hold her like a lantern, illuminating dark places and allowing him to find invisible boxes and items. Watt's main attack also has the ability to automatically override an enemy's defenses, making her a valuable partner in many battles.
In Toad Town, Watt receives two Letters, one from her mother and another from Fuzzipede.
At the end of the game, she is conversing with a group of Shy Guys, and she appears to have befriended them.
In Super Paper Mario, Watt appears as a Catch Card that could be found in the Flopside Pit of 100 Trials. She could also be seen very briefly at the beginning of the game, where she, along with all the other partners in the Paper Mario series could be seen in a photograph at Mario's House.