World 4 in Yoshi's Island DS takes place in the mountains of Yoshi's Island, becoming snowier and colder in the second half as Yoshi scales greater heights. In World 4-5, Baby Bowser encounters Yoshi and his party, and decides to join them on their adventure. However, this alliance is short-lived, as at the end of the world, Baby Bowser abandons the party as he attempts to go off with Kamek. World 4, like all other worlds in the game, has a total of ten levels; six regular, two hidden, and two bosses. The bosses in this world are Six-Face Sal and Big Guy the Stilted.

Level info[edit]

• 4-1: Rock 'n' Fall – This level takes place on the cliffs of Yoshi's Island. Yoshi needs to jump across rocks while avoiding getting crushed by ones coming from above.
• 4-2: High-Speed Cart Race – This level takes place on a high mountain. Yoshi uses a cart to progress through the level.
• 4-3: In the Clouds – This level takes place in the skies of Yoshi's Island where Yoshi has to bounce on clouds to progress though the level.
• 4-4: Six Face Sal's Fort – This level is inside a fortress filled with lava and Fangs, the boss of this level is Six Face Sal.
• 4-5: Friend or Foe? – This level introduces Baby Bowser who can be used to melt ice and light up dark places.
• 4-6: Slip Slidin' Away – This level is on a icy mountain and has a lot of Bumpties which Yoshi must avoid.
• 4-7: Teeth-Chattering Chill Zone – This level involves using the slippery ice as an advantage and as something to beware of, the latter parts of the level introduces Ski Yoshi.
• 4-8: Castle of Big Guy the Stilted – This level takes place in a Castle and involves using Baby Bowser as a shortcut to trigger things that normally require eggs, Big Guy the Stilted is the boss of the castle.
• Secret 4: Hurry and Throw! – This level is inside a castle where the screen autoscrolls in a circle; Yoshi has to run around and collect the three Number Balls to open the door to the next section, where Yoshi has to jump off of the heads of Koopa Paratroopas in the sky.
• Extra 4: Let There Be Light! – A level which begins in a dark fortress with Spikes and Bullet Bills, leading to a space section with Flatbed Ferries, Spinners, and more spikes.

Hookbill The Koopa's Castle is the final level in World 4 of Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3. As the name states, Hookbill the Koopa is fought here.

Overview[edit]

Blue Yoshi starts in a long corridor with Boo Guys, and a Bucket hanging. After this corridor, the Yoshi has to use a bridge to across a lava pool, with a Hot Lips trying to harm Yoshi by spitting lava at him. The Yoshi also finds Koopa Troopas here, and it can use their shells to reach a Flower right above the lava. After the second Hot Lips, the Yoshi can use another shell to collect a Flower above the lava. The Yoshi also finds another bucket and a pipe spawning Boo Guys here. After the lava pool, the Yoshi needs to cross a long corridor, with Boo Guys trying to crush it with Maces. Yoshi must destroy large blocks with eggs here, allowing him to reach a Door.

This door leads to a room, with Winged Clouds that form stairs when hit, and there are several Boo Guys opering maces. The Yoshi can also collect Red Coins here, as well as a Flower by passing through the flippers. Upon entering the door, the Yoshi finds an arrow wheel, which it must use to across a large area with Thorns and reach a locked door. It can also use this arrow wheel to reach a bonus area in the ceiling, where it must defeat two Puchipuchi L to earn a single Red Coin.

To unlock the door, the Yoshi must hit a Winged Cloud in a narrow corridor using a Shell, thus making a stair appear. The Yoshi must then use this stair to reach another door. Here, the Yoshi must ground pound a Crate containing the key. Then, it must simply pass through the flippers to make its way back to the area with the locked door. After entering this door, the Yoshi needs to climb a tower while avoiding the Fishin' Lakitu that tries to steal Baby Mario with its hook. Once the Yoshi reaches the top, it must enter a Warp Pipe, leading to an area with several rectangular blocks, which can be destroyed by throwing eggs at them. There are two Flowers along these blocks. By destroying one of them, the Yoshi is able to use a trampoline to reach the red door leading to the boss.

Names in other languages[edit]