Games like Fantasy Zone II: Opa-Opa no Namida

If you finished Fantasy Zone II: Opa-Opa no Namida, the closest matches are Borderlands 3, Remnant: From the Ashes, Pokémon Shield, Torchlight III and Warhammer: Chaosbane. All 6 share its adventure genre and are ranked by how closely their themes and modes overlap.