Using the Master Ball on some Pokémon in the DLC for can be a great way of ensuring their capture without much effort. The Master Ball is a classic item that makes its return in the second part of DLC pack for the first Gen 9 games. It has a 100% guaranteed catch rate, which means that no Pokémon can escape it. This item is often used on Legendary creatures that are usually the more troublesome ones to capture with their lower catch rates. The problem is that Master Balls tend to be limited.
There is a trick for infinite Master Balls, but even so, they still are hard to come by, even if they can be consistently obtained. Because of their rarity, choosing when to use a Master Ball is always a tough moment, as using it on one Pokémon may make some future encounters a little bit harder to get through. Nevertheless, there are some creatures that are worth the usage of a Master Ball, even if players already have a 100% guaranteed catch rate. The design of the Master Ball gives the captured Pokémon an exclusive house to dwell in, outside the more popular types of Poké Balls.
Although it is the least impressive of the new Paradox Pokémon added with the DLC, the -exclusive Iron Boulder is one of the creatures that deserves a Master Ball. While it is not a Legendary creature per si, it does get that treatment in the game. Only one Iron Boulder can be obtained per save file and players first have to unlock the battle and then locate the creature’s static encounter in Area Zero.
It does not have a very low catch rate and it is fairly easy to catch it with either a Quick Ball at the start of the battle or with an Ultra Ball through the traditional weakening method. Nevertheless, a Master Ball is fitting for Iron Boulder, which is
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