Gura Gura no Mi

The Gura Gura no Mi, also known as the Gura Gura Fruit, is a Paramecia-type Devil Fruit that turns the user into an "Quake Man", allowing them to create shockwaves (or "quakes"). Gura Gura comes from a Japanese onomatopoeia which means unstable or shaking. It was eaten by Edward Newgate.

Strengths and Weaknesses
This fruit's major strength is that it allows Whitebeard to generate shock waves, which can either be in the ground, under the seafloor, or even in the air. Fleet Admiral Sengoku has stated that Whitebeard holds the power to destroy the world. As it apparently has the power to destroy the world, it is by far the strongest Devil Fruit yet introduced, especially for being a Paramecia. The only fruit that rivals with the Gura Gura no Mi in terms of being the "most powerful" is the Yami Yami no Mi.

The only weakness so far, aside from the standard Devil Fruit weaknesses, is that this fruit's powers apparently cannot directly hurt Logia users, as shown with Aokiji's ice-body simply shattering and reforming.

Usage
Whitebeard activates his powers by punching the air, which causes it to crack like glass. When that happens, a massive shock wave is released. Whitebeard has shown to create earthquakes under the seafloor, which caused the ocean water to form massive tidal waves. He also caused such shock waves in the air, which shattered the airborne ice-bodied Aokiji.

Trivia

 * This Devil Fruit's name is reminiscent of Whitebeard's laughter style, "Gurarara". This attribute is shared with Perona's Horo Horo no Mi.
 * The Gura Gura no Mi's powers make Whitebeard resemble the Greek God Poseidon, as the Emperor of the Seas who could cause earthquakes and tsunamis.