In short, we successfully developed a system in which non-emissive tetrazine-containing molecules become even less emissive, and emissive pyridazine molecules become even more emissive in the aggregate state, resulting in ultrahigh emission enhancement ratios. We refer to this effect as the "Matthew Effect in Aggregate Emission" (Figure ), drawing from the sociological term that describes the phenomenon in which the poor become poorer, and the rich become richer in academic society. Given that the intermolecular quenching effect is not limited to the tetrazine moiety, we anticipate additional "Matthew Effect in Aggregate Emission" reports in the future, which can be designed by connecting AIEgens to emission quencher.