In this work, we present a particular nonlinear transmission line called chameleon nonlinear transmission line. In fact, the chameleon's behavior is related to the fact that without changing its appearance, the line can exhibit alternatively purely right -or left -handed behavior. This transmission line is different to the composite one. So, the goal of this work is to demonstrate that this special line can support the propagation of soliton light pulse subjected to quintic -phase modulation, improve the freak wave's mechanism of generation and verify the chameleon's behavior of the line. Consequently, we employ collective coordinate's theory in order to give a great characterization of the light pulse. Then, we introduce an upgraded function called "type II Ansatz function" with eight collective coordinates compared to the conventional Gaussian Ansatz with six collective coordinates. We show that the two additional coordinates will allow us to improve the technique of measurement of internal excitation leading to the generation of rogue events. Moreover, these coordinates will give supplemental details on frequency shift and chirp distortions during the generation of specific rogue events such as "wall of waves", tree structures, multi -wave trains, Kuznetsov -Ma breathers, Akhmediev breathers, Peregrine solitons and triangular rogue waves. The stability of the soliton light pulse will be also investigated at specific frequency ranges.