Complex sentence: Booster dons a new costume created by Blue Beetle with Skeets acting as the mainframe systems controller, who aids Booster and is even able to take control of the costume if Booster is rendered unconscious.
Split into simpler sentences: Booster dons a new costume created by Blue Beetle. Skeets acts as its systems controller, who aids Booster and is able to take control of the costume if Booster is rendered unconscious.