Thermodynamics and shadow of Simpson-Visser black hole with phantom global monopoles

We investigate the thermodynamics and shadow of a non-rotating Simpson-Visser black hole with a phantom global monopole. The model is governed by three parameters: the coupling constant [Formula: see text], the energy scale of symmetry breaking [Formula: see text], and the bounce parameter [Formula: see text], which jointly influence horizon structure and observational signatures. Using specific heat and free-energy analysis, we show that small-horizon configurations are locally thermodynamically stable but never globally favored. Analytical solutions of null geodesics reveal that the photon sphere radius depends on the bounce parameter [Formula: see text] and the energy scale of symmetry breaking [Formula: see text], while the critical impact parameter is still unaffected by [Formula: see text]. Moreover, the photon sphere radius and critical impact parameter, showing that increasing [Formula: see text] enlarges both quantities for an ordinary global monopole, while reducing them in the phantom case. Our results highlight how the bounce parameter and phantom global monopole significantly alter the black hole’s physical and geometric properties.