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Screencap of a section of Sub-Tree in Kirby Super Star Ultra.
Main game The Great Cave Offensive
Mid-boss(es) Bonkers
Boss Fatty Whale
Treasures 13
Theme music

Clip of the theme that plays in Sub-Tree, from Kirby Super Star

Stage order
First stage Crystal
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Sub-Tree is the first section of The Great Cave Offensive, and the area where Kirby initially falls into (and eventually climbs back out from). As the name implies, the area is an underground forest, with lots of trees and foliage. The Boss of Sub-Tree is Fatty Whale, and a Cart ride leads to Crystal from this stage. There are 13 Treasures in this area.


The initial hallway has no treasures in it, but it is lined with a number of small stone steps and is very distinctive. Kirby will eventually find his way back here after clearing through the entirety of the cave, where a Warp Star will be waiting to take him back out again. A door can be found to the right which will lead into the first proper room of Sub-Tree.

The first room is a jungle-like walkway, where Knuckle Joe will be the first to greet our pink spelunker. There are several enemies and side-chambers to be discovered here, most of which hold treasure of some sort. There are three treasures here.

The second room is a more narrow and elaborate tunnel, with a few branches and off-shoots. There are two treasures here.

The third room is a more elaborate series of tunnels with magma in some. Kirby will have to watch where he steps. Along the way, a Save Room can be found. There are four treasures here.

The fourth room is a segmented jungle area. Bonkers is encountered here, though he can be defeated easily by breaking the floor out from under him. This area is split into several smaller chambers, accessible by ladder. There are two treasures here.

The fifth room is a more open jungle area, with lots of foes inside and a bottomless pit below. Some String Platforms can be found here, which need to be cut to access certain areas. There are two treasures here.

From here, the boss room awaits (details in the Boss section below).


Sub-Tree Area Treasures  
Treasure Image Value How to reach
KSS Sub-Tree treasure 01.png
Gold Medal
KSS Gold Medal Treasure Sprite.png KSSU Gold Medal Treasure Sprite.png 10,000 G This treasure is out in the open in the first main room.
KSS Sub-Tree treasure 02.png
Gold Coin
KSS Gold Coin Treasure Sprite.png KSSU Gold Coin Treasure Sprite.png 1,000 G This treasure is inside a side-chamber from the first room guarded by two Lovelies. It can be found in a water pit.
KSS Sub-Tree treasure 03.png
KSS Whip Treasure Sprite.png KSSU Whip Treasure Sprite.png 6,800 G This treasure is in a small grotto under the main path in the first room. Kirby has to break some (but not all) Bomb Blocks to open the way.
KSS Sub-Tree treasure 04.png
Crystal Ball
KSS Crystal Ball Treasure Sprite.png KSSU Crystal Ball Treasure Sprite.png 200,000 G This treasure can be found past a series of Gates in the second room, which Kirby has to open by pressing switches, then running through before they close.
KSS Sub-Tree treasure 05.png
Lucky Cat
KSS Lucky Cat Sprite.png KSSU Lucky Cat Sprite.png 500 G This treasure can be found in a small chamber above the waterway in the second room.
KSS Sub-Tree treasure 06.png
Seiryu Sword
KSS Seiryu Sword Treasure Sprite.png KSSU Seiryu Sword Treasure Sprite.png 142,000 G This treasure can be found above the magma chamber at the beginning of the third room. Kirby has to make sure it doesn't land in the magma, or it will be destroyed (but he can get it again if he leaves and comes back).
KSS Sub-Tree treasure 07.png
Screw Ball (Kirby Super Star)
KSS Screw Ball Treasure Sprite.png KSSU Screw Attack Treasure Sprite.png 80,000 G This treasure can be found beneath a Bomb Block barrier in the floor in a small grotto in the third room.
Screw Attack (Kirby Super Star Ultra)
KSS Sub-Tree treasure 08.png
Echigo Candy
KSS Echigo Candy Treasure Sprite.png KSSU Echigo Candy Treasure Sprite.png 8,000 G This treasure can be found in the ceiling, behind some breakable blocks in the third room.
KSS Sub-Tree treasure 09.png
Zebra Mask (Kirby Super Star)
KSS Zebra Mask Treasure Sprite.png KSSU Phanto Mask Treasure Sprite.png 278,000 G This treasure is in a long cave in the floor through some water from the third room. Barriers will have to be broken from the outside to clear the way.
Phanto Mask (Kirby Super Star Ultra)
KSS Sub-Tree treasure 10.png
Star Stone
KSS Star Stone Treasure Sprite.png KSSU Star Stone Treasure Sprite.png 82,100 G This treasure can be found in the top-left corner of the fourth room, in a small chamber accessible by a Cannon.
KSS Sub-Tree treasure 11.png
Beast's Fang
KSS Beast's Fang Treasure Sprite.png KSSU Beast Fang Treasure Sprite.png 7,300 G This treasure can be found in the lower-right of the fourth room, in a small chamber that has two Gordos buzzing around inside.
KSS Sub-Tree treasure 12.png
KSS Bandana Treasure Sprite.png KSSU Bandanna Treasure Sprite.png 1.990 G This treasure can be found in the middle of the fifth room, held up by three Bomb Block barriers. All three need to be removed to access it.
KSS Sub-Tree treasure 13.png
Springtime (Kirby Super Star)
KSS Springtime Heart Sprite.png KSSU Seasons Heart Treasure Sprite.png 250,000 G This treasure can be found in a grotto under the main path of the fifth room, accessible by cutting a string platform.
Seasons Heart (Kirby Super Star Ultra)

Enemies, mid-boss, and boss[edit]

Sprite (KSS/Ultra) Name Copy Ability Sprite (KSS/Ultra) Name Copy Ability Sprite (KSS/Ultra) Name Copy Ability
KSS Birdon Sprite 2.png KSSU Birdon Sprite 3.png Birdon Wing KSS Knuckle Joe.png KSSU Knuckle Joe Sprite.png Knuckle Joe Fighter KSS Simirror.png KSSU Simirror Sprite.png Simirror Mirror
KSS Bronto Burt.png KSSU Bronto Burt Sprite.png Bronto Burt None KSS Lovely.png KSSU Lovely Sprite.png Lovely N/A KSS Sir Kibble.png KSSU Sir Kibble Sprite.png Sir Kibble Cutter
KSS Gator.png KSSU Gator Sprite.png Gator None KSS Magical Sweeper.png KSSU Magical Sweeper Sprite.png Magical Sweeper None KSS Squishy.png KSSU Squishy Sprite.png Squishy None
KSS Gordo.png KSSU Gordo Sprite.png Gordo N/A KSS Plasma Wisp.png KSSU Plasma Wisp Sprite.png Plasma Wisp Plasma KSS TAC.png KSSU Tac Sprite.png T.A.C. Copy
KSS Grizzo.png KSSU Grizzo Sprite.png Grizzo None KSS Poppy Bros Jr Sprite.png KSSU Poppy Bros Jr Sprite.png Poppy Bros. Jr. Cutter KSS Waddle Dee.png KSSU Waddle Dee Sprite.png Waddle Dee None
KSS Kabu.png KSSU Kabu Sprite.png Kabu None KSS Scarfy sprite.png KSSU Scarfy Sprite.png Scarfy Crash (if scanned with Copy) KSS Waddle Doo.png KSSU Waddle Doo Sprite.png Waddle Doo (and Swinging Waddle Doo) Beam
Sprite (KSS/Ultra) Name Copy Ability
KSS Bonkers.png KSSU Bonkers Sprite.png Bonkers Hammer
Sprite (KSS/KSSU) Name Copy Ability
KSS Fatty Whale Sprite.png KSSU Fatty Whale Sprite.png Fatty Whale Stone (from falling rocks)

Boss: Fatty Whale[edit]

Main article: Fatty Whale
Kirby shoots a sword beam at Fatty Whale.

Just before entering the boss chamber, Kirby has the choice of three Copy Essences. They are Jet, Mirror and Sword.

In the main chamber, Kirby fights the giant whale boss from a bridge spanning over the water. Fatty Whale mainly uses its girth to attack, causing giant waves to carry Kirby off whenever it jumps, and making rocks fall from the ceiling. Defeating it clears the way forward to the first Mine Cart ride, then to the next area, Crystal.


Names in other languages[edit]

Language Name Meaning
Japanese ちていの木々きぎ
Chitei no kigi
Subterranean Forest
Alternatively, Trees in the Depths of the Earth.
Italian Sottobosco Undergrowth
Korean 지하의 숲
Jiha-ui Sup
Underground Forest
Spanish Bosque Forest