|Voiced by|| Tsuguo Mogami (Japanese)|
Kyle McDonald (English)
|(Main attribute used by this battler)||Pyrus|
|Guardian Bakugan||Rubanoid (Given to Ren)|
In Confrontation, after he failed to recruit new people for the Gundalians, he fought alongside Zenet Surrow against Dan and Ren to take Drago and beat them but he decided not to take Drago in the end since the battle ended up as a two on one. Gill later told him to leave the Bakugan Battle Brawlers to Ren.
He battles Marucho and Jake along with Casey in Hostile Takeover and loses.
In The Element, he stole Neo Ziperator from Ren, Ren tried to force him, but decided to battle Dan, he ended up losing Neo and the battle. After retreating, he and Rubanoid are disposed of by Emperor Barodius back on Gundalia. After Rubanoid is transported to Kazarina's lab for use as an experiment, Ren begs for Barodius to give him another chance, to which Sid responds, "Begging for your life, Ren. How weak and pathetic you are." and then Barodius drops Sid through a trap door.
In Sid Returns, Sid, Lena, Jesse and Zenet were shown to not be dead but trapped in Kazarina's Lab, Sid and Rubanoid were the only ones to escape. He then battles alongside Ren and Linehalt against Dan and Drago. After losing, he is shot at by Dharak and would have fallen to his death if not saved by Ren. He then hands Rubanoid to Ren and releases his grip, falling to his death.
In Forgiveness, he was shown in a flashback.
- Pyrus Rubanoid (Guardian Bakugan - given to Ren and then Linus)
- Gold Destrakon Gear (Battle Gear with Ren and then Linus)
- Pyrus Neo Ziperator (used-stolen from Ren) (Deceased)
- Pyrus Scaboid
- His appearance is similar to the character Wolverine from the X-Men series.
- He is the second undercover Gundalian to show his true form other than Ren.
- He did not have a very good friendship with Ren, until his demise.
- He is good friends with his female teammates in the minor Twelve Orders, Zenet Surrow and Lena Isis.
- His face and hair look very similar to those of Gunz Lazar's.
Sid seemed to be a decent brawler.
|Bakugan Gundalian Invaders|
|The Castle Knights(Tag with the Twelve Orders) (Offscreen)||Win|
|The Castle Knights (Tag with the Twelve Orders)||Win|
|Dan Kuso and Marucho Marukura (Tag with Lena Isis)||Lose|
|Unnamed Aquos Brawlers||Win|
|Dan Kuso and Ren Krawler (Tag with Zenet Surrow)||Win|
|Taylor and Casey (Tag with Mason Brown)||Win|
|Jake Vallory and Marucho Marukura (Tag with Casey)||Lose|
|Dan Kuso (Tag with Ren Krawler)||Lose|