Main •
Kira Kosarin as
Phoebe Thunderman, one half of the Thunder Twins. •
Jessica Marie Garcia as Brenda, an athletic barista and latest inhabitant to Secret Shores who Phoebe and Max try to befriend • Max Malas as Steve, a Hero League student with the ability to create marshmallows and s'mores •
Geno Segers as High Tide, an aquatic superhero and the former protector of Secret Shores that used to live in the condo that Phoebe, Max, and Chloe moved in to •
Jeff Meacham as
Principal Tad Bradford, the principal of Hiddenville High School • Ben Francis as Stardust, a supervillain working for Master who can generate and become dust • Christian Lagasse and Sandra Shapiro as Pop and Lock, a former breakdancing duo-turned-criminals working for Mastermind who specialize in hand-to-hand combat • Ajay Banks as Professor Portal, a portal-generating supervillain working for Mastermind •
Kenny Ridwan as
Gideon, a friend of Max •
Pyper Braun as Penny, the younger sister of Captain Perfect who is also an expert at using different gadgets • Gabrielle Nevaeh Green as Kiefer, the lead henchman of Mastermind who serves as the Villain League's recruiter • Jonathan Vellner as the unnamed assistant henchman of Kiefer • Alexander Brophy as Weird Frank, a weird kid who Jinx gives his mother's radish loaf to • Brenda Crichlow as Nana Jinx, the grandmother of Jinx • Ryan Mah as Lazlo Chance, the founder and owner of Chance Technologies •
Helen Hong as
Mrs. Wong, the proprietor of Splatburger who also owns Splat By-The-Sea • Viola Abley as Bria, a member of the acrobatic Flip Sisters •
Anna McNulty as Lexi, a member of the acrobatic Flip Sisters •
Peter Kelamis as Cave Guardian, a long-living inhabitant of a cave beneath Secret Shores who guards the Power Amulet that can copy any superpowers • Addison Riecke as Nora Thunderman, the sister of Phoebe, Max, Billy, and Chloe who possesses laser vision. She was studying abroad during most of the first season and showed up in person in "The Most Thunderful Time of the Year". == Episodes ==