This one’s a bit controversial. A ball that catches any pokémon without failure is indeed incredibly useful. But the concept of Pokémon is to travel the world fighting, defeating and catching pokémon. The inclusion of the masterball completely cheapens the entire concept.
Let me put this into perspective for you. Your character is a young hero who has left his mother behind and embarked on a grand adventure. Criminal organizations have fallen under his might. Grown men have wept at his feet. Finally, you face your greatest foe: A Pokémon of legend. A monster that was said to have created the very ground you stand on, that has flooded cities and annihilated everything in its path. You are the only person that can face this beast. The story of this battle will be passed down through generations. And what do you do? You throw a FUCKING masterball! Through no challenge or skill, you have managed to catch the greatest of all the Pokémon. Any victory you have now will be a hollow one, devoid of meaning. I hope you’re happy.
via Dorkly Bits