It wasn't long before the two giants were engaged in battle. At first, it seemed Rexy had the advantage as he swung the Indominus round and round, but the Indominus eventually broke free. "Stew, C'mon!" Amy shouted. "We've got to go help Rexy. He won't last against that I-rex much longer!" Stew proceeded to make sure both Natalie and the group leader were taken care of before going down to Amy. The two then jumped in Amy's car, ready to assist.
Rexy cried out in pain as the Indominus slammed him into a canyon wall, slowly starting to weaken him. The I-rex prepared to deal the finishing blow when Amy & Stew raced up from behind and began pelting the Indominus with gunfire. "Amy, are you sure this will work?" Stew asked worriedly as the I-rex quickly turned its attention to the new threat. "Well, hopefully we can distract him long enough for Rexy to get back up." Amy drove as fast as she could, but the Indominus was catching up fast. Just as it was about to cut them off, Rexy charged in, catching the Indominus off-guard. In the process, Rexy's tail slammed into the car, sending both Amy & Stew into the bushes nearby and knocking them out.
As the fight went on, the other board members attempted to flee, but most craft, including Tim's, were knocked down by the dueling dinosaurs.
Rexy tried his best, but he was simply no match for the fully grown Indominus. He again tried to grab the I-rex by its neck, but to no avail. Rather, the two animals slammed into one another. In doing so, the I-rex managed to grab Rexy by the arm, and with a strong tug, ripped it off. Rexy roared so loud that practically the whole island could hear. Amy came to soon after only to see the Indominus knock Rexy over, ready to end the battle. "NO!" She cried fearfully.
Suddenly, the ground began to shake violently. "What's happening?" Stew asked wearily as he finally awoke. "I don't know!" Amy shouted over the loud rumbles. Just then, a giant animal burst through the opposite canyon wall and charged the Indominus. Amy & Stew looked up to see none other than Scout, ready to help his sibling. "Scout?! But how?" Stew asked in a state of shock. "Funny thing about that…" Amy said. "We'll talk about this later. Come on! Let's get back to the treehouse and make sure Natalie's still ok."
The two dinos were engaged in a fairly balanced fight until Rexy managed to get back up and begin assisting in the fight. Working together, Rexy and Scout soon gained an advantage over the I-rex and were able to successfully bring it down with one quick snap-of-the-neck. The two then bellowed loudly, claiming their victory over the now downed I-rex.