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Coach Boomer was once the super hero Sonic Boom due to his ability to release sonic waves from his vocal cords. Once he retired from active duty, He became the gym teacher and coach at Sky High School. At Sky High, Coach Boom is in charge of power placement, where each student is chosen to be either a Hero or Sidekick. He conveniently uses his power to bark at any student who doesn't live up to his expectations, or complains. Boomer is also quite possibly a rival of Stronghold from back at their highschool days and hero careers, since Stronghold was visibly irked when he realized that Will has been relegated as a Sidekick. He is also the referee for the sport "Save the Citizen". He is good friends with Professor Medulla, and is always trying to get him to Double date with him.
- "Did I mention she's not just her twin, but her evil twin?"
Characters: Will Stronghold | Layla Williams | The Commander | Jetstream | Warren Peace | Ethan | Magenta | Zach | Royal Pain/Gwen Grayson | Lash | Speed | Penny Lent | Stitches | All American Boy | Coach Boomer | Ron Wilson | Principal Powers | Freeze Girl | Professor Medulla | Nurse Spex | Jennie Elast | Mr. and Mrs. Timmerman
Locations: Sky High School | The Stronghold's House