Ferrimagnetic skyrmions offer enhanced tunability due to antiferromagnetically coupled sublattices and reduced net magnetization. In chiral magnetic films at zero magnetic field, skyrmion stability is characterized by a dimensionless parameter $\kappa$, yet its applicability to ferrimagnetic systems remains unclear, as most studies assume a fixed, strong intersublattice exchange coupling $J$. Here we investigate how variations in $J$ govern stable and metastable ferrimagnetic skyrmion configurations and introduce a dimensionless parameter ${\zeta }_{\mathrm{eff}}$ to characterize the crossover between strong and weak intersublattice locking. In the strong-coupling regime, intersublattice locking enables stabilization of skyrmion in a sublattice where intrinsic Dzyaloshinskii-Moriya interaction is absent while the other sublattice has finite DMI, yielding a sublattice with DMI-free ferrimagnetic skyrmions. As $J$ decreases, this locking breaks down, leading to independent sublattice behavior and the failure of an effective $\kappa$-based description. Our results establish a unified framework linking intersublattice exchange and skyrmion phase stability in ferrimagnetic systems.

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• Ferrimagnetism
• Magnetic interactions
• Micromagnetism
• Phase diagrams
• Skyrmions
• Chiral magnets
• Ferrimagnets
• Magnetic thin films
• Landau-Lifschitz-Gilbert equation
• Micromagnetic modeling