This study illustrates collaborative platforms and diversifying partnerships for South-South and triangular cooperation in development. The English School’s pluralism-solidarism spectrum is applied as a tool to explain transformative features of the changing international society in times of crisis. The study focuses on the intermediary pluralist-solidarism phase that shows dynamics of middle power coalitions using nation branding and collaborative governance as key strategies. The transitional phase is exemplified by two approaches. One is the bilateral approach to coalition shown through the case of China, whereas the other is the inclusivemultilateral approach demonstrated through the case of South Korea. Implications are given toward relatively loose networks that have the potential to evolve into platforms with institutional grounds, especially for middle powers seeking opportunities in the new normal.