Jet Booster


 * Not to be confused with the Jet Engine.

The Jet Booster is an upgrade for E-102 Gamma in Sonic Adventure and Sonic Adventure DX. The Jet Booster is from a series of gravity-linked jet disks, created by Dr. Eggman for selected models of his E-100 Series Robots, namely E-101 Beta, E-103 Delta, E-104 Epsilon and E-105 Zeta and E-102 Gamma itself. The Jet Booster allows the user to hover above ground for limited amounts of time, which is similar to Tails' Booster and Dr. Eggman's Jet Engine, except that the Jet Booster can make the user hover for longer time.

The Jet Booster reappeared in Sonic Battle where it was used by E-102 Chaos Gamma, Emerl and E-121 Phi; Chaos Gamma due to being based on the original E-102 Gamma and Emerl and the E-121 Phi's due to their copycat skills.

Location
The Jet Booster is located in the Egg Carrier's Adventure Field, inside the Egg Carrier itself. It is found inside the Egg Carrier's armory, which can be accessed from the main hall on the upper floor. The Jet Booster is then placed directly under the entrance.

Sonic X
The Jet Booster appeared in the animated television series Sonic X. Following the adaptation of the Sonic Adventure storyline, Dr. Eggman created the E-101 Beta, E-102 Gamma, E-103 Delta and E-104 Epsilon as the crew on-board the Egg Carrier and equipped each of them with the Jet Booster.

Sonic the Hedgehog (Archie)
The Jet Booster also appeared in the Archie Comics' Sonic the Hedgehog, but are referred to as Grav-Linked Jet Disks. Following the adaptation of Sonic Adventure in the comics, Dr. Eggman created his first E-Series of robots, namely E-101 Beta, E-102 Gamma, E-103 Delta and E-104 Epsilon and gave each of them a Grav-Linked Jet Disk. Despite not being physically shown during the E-Series introduction, they were clearly hinted during Dr. Eggman's attack on Angel Island.

After this adventure, E-102 Gamma ventured out on his own after leaving the Eggman Empire, and fought Eggman's forces. During that time he made great use of the Grav-Linked jet Disk, but at the time Shadow the Hedgehog came to recruit him on behalf G.U.N, it was considered outdated and was finally destroyed along with E-102 Gamma, after E-123 Omega destroyed E-102 Gamma itself.

Trivia

 * The Jet Booster is the only upgrade in the Sonic series that is shared with non-playable characters.