Their first appearance is in episode 7, where they challenged Anubias but were both defeated easily by Horridian and his BakuNano Aeroblaze. Mag Mel is watching them and decides to make them a part of his army and gives them two Flash Ingrams. Later, Shun and Marucho watch them destroy an unknown team with their new BakuNano mercilessly.
Later, they both battle Marucho and Trister, and they were defeating them. However, Shun intervenes and they battle him. At first, they are winning due to their BakuNano but are ultimately defeated by Shun.
- Pyrus Spidaro (Jerryl's first Guardian Bakugan)
- Darkus Ziperator (Callum's first Guardian Bakugan)
- Darkus Flash Ingram (Callum's Guardian Bakugan)
- Pyrus Flash Ingram (Jerryl's Guardian Bakugan)
- Copper Shoxrox (BakuNano) (x2)
- Their nickname is taken from The Mighty Ducks Dean Portman and Fulton Reed - The Original "Bash Brothers".
- They are very similar to the Tri-Twisters because both teams have two boy group members, and the fact both teams were hypnotized by Mag Mel and both teams got Chaos Bakugan (Flash Ingram and Cyclone Percival).
- The Bash Brothers resemble Shuhei Hisagi and Izuru Kira from Bleach.