Ultra Ball

The Ultra Ball (ハイパーボール Hyper Ball) has a 100% higher chance to catch a Pokémon than a regular Poké Ball, and a 50% higher chance than a Great Ball. It has a catch multiplier of 2.0. It has a black and yellow top, often with the yellow forming an "H" on the top of the ball. In Japan, It is called a Hyper Ball, hence the "H" pattern on top.