>>53538791Gen 1: Just version exclusives.
Gen 2: Version Exclusives but the Box Legendaries have different dungeons.
Gen 3 Version Exclusives and different enemy teams, where the game is obviously made for Team Aqua and Team Magma is awkwardly pasted over them in Ruby.
Gen 4: Just Version Exclusives
Gen 5: Version Exclusives, A few cities and dungeons have aesthetic differences, One city is entirely different with a different Gym leader. Post-Game City has vastly different connectivity features.
Gen 6: Just version exclusives.
Gen 7: Version exclusives, opposite day/night cycles, A different first boss.
Gen 8: Version Exclusives, two gyms have different leaders.
Gen 9: Version Exclusives, Different Professors, Different Pants.