During one of Optimus Patrols with Spyro (purple dragon with a red scaled Scarf) .. He came across Marinette.(With blue hair and a while lining)... She was hurt badly... And it seemed as if her right arm was broken... Both of them stopped and checked and saw she is unconscious and agreed to bring her back to the base for a replacement arm.

Later Marinette slowly wakes up in the Autobot base... With a new mecha right arm.