The recent announcement of a mild excess in diphoton channel around 750 GeV has generated a lot of excitement. I will exemplify phenomenology a simplified model containing a scalar resonance coupling to gluon, photon and dark matter particle. I will describe constraints due to existing dark matter monojet searches on this parameter space. If the resonance is confirmed in the next round of data taking, the simplified model considered here will be either ruled out or lead to insights into the scale of new physics.