Sidekick

'Sidekick' is a Canadian animated television series based on the 2005 The Not-So-Superheroic Adventures of Sidekick shorts from the anthology series Funpak. It premiered 2010 and ended in 2013 after three seasons and 52 episodes. The show focuses on Eric Needles, a young boy who's the sidekick of missing superhero Maxum Man, and his friends Trevor, Vana and Kitty, as they attend the Academy for Aspiring Sidekicks while dealing with its cruel headmaster Professor Pamplemoose and the supervillain Master XOX.

S1E18A: Suit of Harms
The kids are placed in blue safety suits that inflate to the point they're immobile, making it difficult for them when Master XOX arrives.