From WiKirby, your independent source of Kirby knowledge.
Vegetable Valley - Stage 2 is the second stage of the first level, Vegetable Valley, in Kirby's Adventure and its remake, Kirby: Nightmare in Dream Land. It is notable for featuring the HAL Room.
This stage takes place in four primary rooms. The first is a grassy walkway which introduces Kirby to some of the more famous invincible foes in the series; those being the Shotzo and Gordo. Kirby will quickly learn that all he can do is avoid these pests as he eventually stumbles onto a Warp Star at the end of the path.
The Warp Star first bounds along the ground before taking off. Then it bounces along higher cliffs past the hapless enemies before finally landing in a rocky sloped area. From there, Kirby climbs a hill and falls into a flat arena where he must fight the first Mid-Boss, Poppy Bros. Sr., who will not let Kirby pass until defeated.
After passing through another doorway, Kirby ends up in a cave filled partway with water. Here, Kirby may learn that many enemies in fact cannot swim. At the end of this cave, there is an offshoot path that contains a Maxim Tomato blocked off by Star Blocks. These blocks can be Inhaled or broken with an ability attack.
The last room is a quick switchback cave leading upward. A Sword Knight guards the stage exit.
Exclusive to Kirby's Adventure, there is a HAL Room which can be accessed behind the Warp Star. If Kirby backtracks to the precise point when the Warp Star disappears from view, then returns, the Warp Star will no longer be there, and Kirby will be able to walk further to the right, eventually coming across the star block formation. Unlike later HAL rooms, there are no special items or rewards available in this room, and it is purely an Easter egg. Note that this does not work in Kirby: Nightmare in Dream Land; it does work in the 3D Classics version, but the mechanics are altered, making it more difficult to access.
There is a hidden doorway in the final cave area, which leads to a room with a waterfall, a Bronto Burt, and a 1-Up.
Enemies and Mid-Boss
Falling past a Gordo, blocked from reaching Kirby by a Star Block
Ducking in a path underneath a Shotzo
Flying towards a Warp Star
The HAL Room, just past the Warp Star
Riding the Warp Star, bouncing off the tips of cliffs
Battling with Poppy Bros. Sr.
Preparing to leap out of an underground pool
Nabbing a Maxim Tomato in a nook under the door
Climbing a ladder in the winding cave
Heading toward a 1-Up in a secret room
Approaching the Sword Knight and Cappy guarding the stage exit