The Master Ball, like all Poké Balls, is spherical in shape. The top and bottom halves are divided by a horizontal black band, on which the button is found on all Poké Balls. The top half of the Master Ball is purple, with a white letter "M" on the front, with a pink circle on either side. Master Balls are developed by Silph Co.
The Master Ball was distributed at Pokémon Center stores throughout Japan from November 19 to December 3, 2011. It was also distributed at the Tohoku Pokémon Center individually from February 28 to March 16, 2012 due to the Tohoku Pokémon Center not being open at the time of the initial distribution.
In Pokémon Pinball and Pokémon Pinball: Ruby & Sapphire, the Poké Ball that serves as the pinball is capable of being upgraded to a Great Ball, an Ultra Ball and a Master Ball. However, this serves solely as a score multiplier, as catching a Pokémon is always guaranteed, even with a regular Poké Ball.
NA:These valuable, powerful balls can capture any wild Pokémon. In Smash Bros., hard- to-find Pokémon often pop out of them. You can easily identify a Master Ball by the distinct purple appearance and large M on the top. A Pokémon within a Master Ball may turn the tide of battle.
PAL:A rare type of Poké Ball that never fails to catch a Pokémon. Throw one in this game, and the Mythical or Legendary Pokémon inside will come to your aid. Master Balls are easy to identify due to their purple colour and the large M on them. Use one to quickly turn the tide of any battle!
In Whiscash and Ash, the fisherman Sullivan attempted to use a Master Ball in a last-ditch attempt to catch Nero, an oversized wild Whiscash that had long eluded him. However, Nero swallowed the Master Ball and disappeared back into the water, not being caught. At the end of the episode, Nero was seen playing with the Master Ball on its tongue.
In Pokémon Origins
Master Ball in Pokémon Origins
The Master Ball never made an actual appearance in Pokémon Origins, only appearing in Silph Co. president's secretary's demonstration in File 3: Giovanni. She mentioned that the Master Ball was still in development, and only existed as a prototype. She also told that it was why Team Rocket had taken over their office building; they intended to accelerate the development of the Master Ball and then steal it when it would be completed, making sure they would be the only ones possessing it. After Team Rocket was driven out of the building by Red, it was mentioned that the development of the Master Ball was put on hold for a while.
As a Trainer card, this card allowed the player to look at the top 7 cards of their deck and add one Pokémon card from those cards to their hand, then shuffle their deck. As an Ace Spec Item card, this card allows the player to add 1 Pokémon card from their deck to their hand.