The place of anger

Reiji, Daisuke, and Rockaku have only a few hours to get a special stone to qualify for the tournament. Rockaku decides to take a nap and tells them that this will prove whether they should be able to be on his team or not. Reiji and Daisuke find a bunch of stones huddled together, but it turns out to be a trap set by the two twins from before. They use their dragons to ambush Reiji and Daisuke. Daisuke orders Reiji to stay out of the fight so he can prove his strength. Daisuke is severely overpowered, but refuses to give up. Touched by his determination, the sister of the twins gives Daisuke an orb and tells him that he deserves it because she wants to see somebody like him make it to the next rounds so they can defeat him. But, it is all a trick and Daisuke is attacked by both dragons and defeated. Reiji gets very angry at the twins for tricking Daisuke like that and begins to go into a rage. Chibi's body begins to turn black and seems to have become more powerful. What is happening to Chibi?