From Entrance(4-D), go 4-C. You need to set all the diamond
block in front of Stone Statue. 

Be at (1) and use Exchange Hook for (A). Then go (2) and do
exchange for (B). Move (A) which is in (1) to where (B) was.
Now you get a key.
( NOTE : You are in water and swimming. )
 

Go to 3-C and on yellow tile area, float up to 8-C.
Then go 8-B and get dungeon map. Then go 7-B, 6-B and to 5-B.
Push down block right and push upper block up to go 5-C.
Stairs up to 3-H. Go 4-H and to 3-H(left). Then go 2-H.
 

<Water Level Down>
In 2-H, there are three switches. Switch in Red area is to
down the water level. switch in Blue area is for up.
Now you can step on Red area. Make level down.
<NOTE: Map changes when water level changes>
 

Then go 3-H, 4-H to 3-H(right). Stairs down to 5-C. 
Go 6-C and jump into hole at right side of the room.
Now you will be in 1-C.
 

Exchange Hook for Pot to go center. And Exchange Hook
for Pot for left side of the room. Get a Ring in t-box.
 

In 2-C, move a block bottom to right and get a key in t-box.
 

In 3-C to 3-D. Defeat all Piece and LikeLike. Then you get
Compass in t-box.
 

Put Somalya block on switch in 2-D. Go 2-E and defeat
Bubble with Boomerang. 
 

Go stairs(d) up to 7-E. Go 6-E to 5-E. Defeat Spark with
Boomerang. Fairy appears. Charge your heart with fairy.
Exchange Hook to pot to go 5-D.
 

Exchange Hook for diamond blocks to go stairs and up to
3-I. Go 2-I to 2-H. Step on switch to water up. Go 2-I
to 3-I and down stairs to 5-D.
 

From 5-D, 5-E, 6-E to 7-E. Go 7-F and defeat 2 Tail.
Get a key from t-box.
 

Back to 7-E. Go 6-E to 6-D. Sink in water to go 1-D.
Gacha Seed in t-box. Get down to stairs(g) to go
Mini-Boss room.
 

Mini-Boss: Hookray
Shoot Ouch Fruit by Beans Gun to Hookray. It shrink and
fall down. Cut it with sword. It soon expand back and fly.
Keep on this process. If touch bubble, you get damaged.
Cut the bubble to get Ouch Fruit.
 

Go up (h) to go 1-E. T-box(left) has <Long Exchange Hook>
in it. Exchange with diamond block to go 2-E.
 

From 2-E to 2-D. Exchange with diamond block to go 2-C.
Go 1-C and down stairs to 1-B. In the underpass, you need
to exchange with pot to go left. In 1-B, defeat Rope, Biri
and Monea to get a key.
 

In 2-B, float up at yellow tile area to go 7-B. Then go
6-B, 5-B, 5-C and staris up to 3-H. Then go 4-H, 3-H(left)
and to 2-H. Level down the water.
 

Go 3-H(left), 4-H, 3-H(right) and stairs down to 5-C.
Then go 6-C and jump into hole to go 1-C. and go 2-C.
Finally go 3-C. From left side, exchange with diamond block.
Then exxhange with pot above and go to left switch.
Stand left to the switch. Exchange with diamond block.
Then step on switch and exchange with diamond block to
put it on switch. THen put Somalya block onto right switch.
You get a key.
 

Go 3-D to 2-D. Somalya block onto switch and go 2-E. 
Stairs up to 7-E, 6-E, 5-E to 5-D. Exchange with diamond block
to go center and stairs up to 3-I. Pass 2-I to 2-H and
water level up.
(NOTE: Exchange Hook will take Hiploop's mask away.
       Then you can attack it from front )
 

Back to 2-I and exchange with diamond blocks on right.
Go to 1-I, 1-H, 2-H to step on switch to water level up.
Then go 1-H, 1-I, 2-I, 3-I to 4-I. Exchange with diamond
block to go right and get a key ion t-box.
 

In 3-I, stairs down to 5-D. Then 5-E, 6-E, 7-E, 8-E,
8-D, 8-C, 8-B, 7-B to 7-A. Exchange with diamond block
to get a key.
 

From 7-B, 8-B to 8-C. Exchange with pot to go 8-D.
Then 8-E, 7-E, 6-E, 5-E and to 5-D. Stairs up to 3-I.
 

From 2-I, 1-I, 1-H(bottom), 1-G to 1-H(upper).
Gacha Seed in t-box. Then 1-I to 1-J. Get a Boss-room
Key in t-box.
 

Exchange with doamond block on left to go 1-I(bottom).
Exchange with diamond block down in 2-I to go 3-I.
Stairs down to 5-D. Go 5-E, 6-E and to 6-E. Sink in
Water to go 1-D. Float up at Green tiled area to go 6-D.
Then 6-E, 7-E, 8-E to 8-D.
 

Boss: Plasmarine
Plasmarine shoot bubble to you. Use this bubble to
defeat Plasmarine. When Plasmarine is in blue color,
bubble is also blue. Use Exchange Hook to Plasmarine
to let bubble hit Plasmarine. Exchange will change
Plasmarine's color(blue/red). Blue/Red bubble hitting
Red/Blue Plasmarine will give damage to it.