Plant Kingdom

Plant Kingdom (プラントキングダム) is the first stage in Sonic Rush Adventure (excluding the training level). Located on an island that is due west from Southern Island in Blaze's world, this zone features a jungle theme with a green and lust landshape, a common trait among the first levels in the Sonic the Hedgehog series. Green Material can be earned from this stage.

Overview
Plant Kingdom initially starts on a beach, but the majority of the level is jungle/forest themed, with grind vines and mushrooms. This level bears a resemblance to Mushroom Hill Zone from Sonic & Knuckles

Towards the end of Act 1, there is a 3D section where the player has to grind on three vines; the player can freely switch between the three vines in order to avoid obstacles and collect Rings.

The boss of the level is Ghost Rex. The Ghost Rex attacks by biting down and by ramming the player from the side. When the Ghost Rex attacks, the player must jump on its head as many times as possible. When its health is halfway gone, the Ghost Rex will stomp on the ground, breaking it, causing it and the player to fall into a pit. The Ghost Rex will then attack similarly as it did before, except its bite will be a head-slam, after slamming it's head the Ghost Rex will move its head around, making it harder for the player to hit. When its health guage is depleted, the player has to hit the Ghost Rex one more time, causing it to explode.

History
After Sonic, Tails and Marine built the Wave Cyclone early in the story, Marine then suggests using the waterbike to travel to an island in the west. When they reach the island, they encounter with the Ghost Rex and Sonic fights with it. After Sonic defeated the Ghost Rex, the trio met up with Tabby, a member of the Coconut Crew, who told them that more Materials could be found at an island in the southeast.