Seaside Island

Bygone Island is the main setting of the Sonic Boom series and where Sonic and his friends live. The island is shown to have various regions with climates and environments different from one another, such as a region of ice and snow neighboring a tropical forest.

Bygone Island is frequently attacked by Dr. Eggman from his lair which lies just off the coast of the island.

Topography
The island has various regions, often different from one another, such as tropical forests, frigid and a desert canyon.

Locations

 * Coral Bay
 * Crater Lake
 * Danger Falls
 * Hazard Jungle
 * Mount Safety
 * Mystery Bay
 * Peril River
 * Pleasant Gardens
 * Seaside Coast

Settlements

 * Amy's House
 * Gogoba Village
 * Knuckles' Hangout
 * Sticks' Burrow
 * Sonic's Shack
 * Tails' House
 * Tails' Workshop
 * Village
 * DangerCo Deadly Equipment Warehouse
 * Library
 * Mayor Fink's mansion/courthouse
 * Mike the Ox's shop
 * Village Center
 * Meh Burger
 * Meh Burger warehouse

Other

 * Buddy Buddy Temple (destroyed)
 * Seaside Harbor Light

Sonic Boom: Rise of Lyric
Bygone Island is the second hub world area in Sonic Boom: Rise of Lyric. Here, the player can take up different side quests for Power Glyphs by talking with different residents and completing their given mission.

Other areas of the island beyond the town is the semi-dormant volcano which leads to Crater Lake. Another outside of town leads to the farmlands where Slowpoke Isle is beyond. Along the beaches outside the front of the town is Coral Bay which holds the entrance to the Ocean Purification Plant and another secluded beach named Mystery Bay which leads to Creeper Gorge. Near the starting point of Bygone Island is a tower called the Seaside Harbor Light where to access the Sky Citadel.

North-east of Bygone Island is the desolate waste where Lyric chose to establish his lair at.

Sonic Boom: Shattered Crystal
Five major island locations surrounding Bygone Island are introduced which include Scrapyard, Shadow Canyons, Ancient Ruins, Volcanic Crater and Cloud Sanctuary. Sonic Boom: Shattered Crystal confirms also that Sonic and his friends live on Seaside Coast of the island.

Trivia

 * As of yet, the island is not actually named in the TV series. However, it is identified in Sonic Boom: Rise of Lyric as it is one of the hub world levels in the game.
 * Bygone Island, or at least the whole overworld in Sonic Boom: Shattered Crystal is also unnamed.
 * As implied by T.W Braker's circus truck in "Circus of Plunders," traffic on Bygone Island drives on the right.