I think master balls should have had a caveat with them starting with gen 2. Everyone knows they have a 100 percent catch rate. That’s fantastic. But it’s essentially forcing a Pokémon to become yours without its being able to have a choice. Basically slavery ya know? It would’ve been interesting to have the happiness meter be set to a negative rate and you’d have to work it up or a certain number of battles where it won’t obey because you enslaved it by force. It’d be an interesting mechanic at least.