Proven Shadow is the second episode in Bakugan: Rise of Helstara Arc 1.
On the journey the two began back in A Grand Return, Leonidas and Valentin Kazami discover a set of ruins in a long-deserted section of New Vestroia. There, Valentin finds a large carving that shows the six Attribute Symbols plus six more, only unrecognizable, symbols. Leonidas stares at the symbols, stating that they look peculiar. After that, the two exit the ruins, only to be encountered by a figure who introduces himself as Shadow Prove. Despite Shadow having three Bakugan and Valentin one, Leonidas is still stronger. Shadow sends out a Darkus Sylthee, a Bakugan that Valentin nor Leonidas have ever seen before. Shadow then sends out a Darkus Anchorsaur and a Darkus Hammersaur. As the battle ensues, Leonidas reveals his new powers as Doom Leonidas. In the end, Leonidas and Valentin beat Shadow with no Abilities, for Valentin did not have a Gauntlet. Shadow then teleports away, telling the two that he'll be back for revenge. Valentin then states that he needs the device that Shadow had in order to use Bakugan Ability Cards - referring to his Gauntlet. Leonidas then reveals that he has one of those, and says that he had stolen it from a Vestal base in case. Valentin then questions why Leonidas did not tell this to him earlier, but Leonidas says that the place where he hid the Gaunlet was too far to reach in time when they had encountered Shadow. The two then fly off in order to reach the Gauntlet's hiding place.
Meanwhile, a portal opens up in New Vestroia and a figure comes out of it, looking around. The figure is a young boy with red hair.
- Valentin Kazami
- Shadow Prove
- Doom Leonidas