  In this work, we study the synthetic explosions of a massive star. We take a
100 M$_{\odot}$ zero--age main--sequence (ZAMS) star and evolve it until the
onset of core-collapse using {\tt MESA}. Then, the resulting star model is
exploded using the publicly available stellar explosion code, {\tt STELLA}. The
outputs of {\tt STELLA} calculations provide us the bolometric light curve and
photospheric velocity evolution along with other physical properties of the
underlying supernova. In this paper, the effects of having large
Hydrogen-envelope on the supernova light curve have been explored. We also
explore the effects of the presence of different amounts of nickel mass and the
effect of changing the explosion energy of the resulting supernovae from such
heavy progenitors, on their bolometric light curves and photospheric
velocities.
