"Kerbeus: Guard Dog of the Underworld!" (冥界の番犬！ケルベウス！！, Meikai no banken! Kerubeusu!!) is the second episode of Beyblade Burst, the first season of the Beyblade Burst anime. It first aired in Japan on April 11th, 2016, in Canada on September 11th, 2016, in Australia on December 6th, 2016, and in the United States on December 20th, 2016.
Valt has emerged as the winner of his first round at the local tournament! Shu finds himself shocked that the battle against Rantaro ended with a Burst Finish. While Valt excites himself to begin his intensive training, he is invited by Nika and Toko to see a puppet show. But the contents of the puppet show was slightly unusual. And, as the second round of the local tournament begins, the opponent facing Valt is Ken Midori, the puppet-controlling Blader.
- Valt gets his first example of why you shouldn't get overconfident after one win in a tournament, as Rantaro was able to shut down Valt's Rush Launch and defeat him in another match they had.
- Valt begins his battle against Ken in the second round of the local tournament.
- Valt Aoi
- Shu Kurenai
- Rantaro Kiyama
- Ken Midori (With Keru & Besu)
- Daigo Kurogami
- Wakiya Murasaki
- Chiharu Aoi
- Toko Aoi
- Nika Aoi
- Kento Aoi (Mentioned)
- Principal Shinoda
- Ichiro Kakitani
- Keita Nakagawa
- Momoko Ogi
- Hiroshi Oi
- Valtryek V2 Boost Variable (Valt's)
- Spryzen S2 Knuckle Unite (Shu's)
- Roktavor R2 Gravity Revolve (Rantaro's)
- Kerbeus K2 Limited Press (Ken's; Debut)
- Valt Aoi (Valtryek V2 Boost Variable) vs. Rantaro Kiyama (Roktavor R2 Gravity Revolve) = Rantaro & Roktavor (2-0)
- Round 1: Rantaro & Roktavor (Burst Finish; 2pts)
- Valt Aoi (Valtryek V2 Boost Variable) vs. Ken Midori (Kerbeus K2 Limited Press) = Battle continued in the next episode
- Round 1: Ken & Kerbeus (Survivor Finish; 1pt)
Special Moves Used