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Proto:Super Mario World 2: Yoshi's Island/ys romX 0/World 1

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This is a sub-page of Proto:Super Mario World 2: Yoshi's Island/ys romX 0.

So very stubbly.
This page is rather stubbly and could use some expansion.
Are you a bad enough dude to rescue this article?
This article is a work in progress.
...Well, all the articles here are, in a way. But this one moreso, and the article may contain incomplete information and editor's notes.
To do:
  • Is this GIF at the right framerate?
  • Level maps.


As can be seen above, the World 1 map is much different than the final game, sporting considerably more color and animation.

Introduction Level

Intro stage map(s)
Intro stage (level $30) Intro stage (level $30))

When starting this level from a new file (that isn't File 1), a small prologue level is loaded before the real World 1-1. It is a very basic jump stage with a few coins. No enemies or eggs are present. When the end of the prologue is reached, the beginning of World 1-1 loads.

YIP Intro.png YIP Intro QB.png

World 1-1

Ys romX 0 & ys rom 0 D w1-1 Preview.png
W1-1 map(s)
1st room (level $00) W1-1 1st room (level $00)

Seems to showcase various base mechanics from throughout the game. It most prominently features the giant Chain Chomps that jump from the background and create holes in the level. They do show up in the final release in World 1-2 (Watch Out Below!), but in this level they can be seen breaking through the yellow platforms, which was not featured in the final version.

Ys romX 0 w1-1 01.png Ys romX 0 w1-1 02.png Ys romX 0 w1-1 03.png Ys romX 0 w1-1 04.png

Ys romX 0 w1-1 05.png Ys romX 0 w1-1 06.png Ys romX 0 w1-1 07.png Ys romX 0 w1-1 08.png

The first part of the advice that shows up when hitting the first Message Block is similar to an unused message that can be found in the final version (ID #01C0).

Ys romX 0 w1-1 Advice 01.png

World 1-2

Ys romX 0 & ys rom 0 D w1-2 Preview.png
W1-2 map(s)
1st room (level $01) W1-2 1st room (level $01)
2nd room (level $31) W1-2 2nd room (level $31)

A jungle-themed level that doesn't seem to resemble any particular level of the final game.

Ys romX 0 w1-2 01.png

The bottom part of it features a Flower, a Melon (uses a different design from the final game), four Goombas, and three eggs to collect inside a block.

Ys romX 0 w1-2 02.png

The ? Cloud at the beginning of the level, when hit by an egg or a watermelon seed, activates another staircase that makes it possible to reach the upper part of the level and a graphically-glitched monkey.

Ys romX 0 w1-2 03.png Ys romX 0 w1-2 04.png

When moving to the right, some Piranha Plants can be found. They can be defeated by hitting them with an egg or by spitting watermelon seeds, then stomping on them.

Ys romX 0 w1-2 05.png Ys romX 0 w1-2 06.png Ys romX 0 w1-2 07.png

After the Piranha Plants, an Advice Block can be found before a box. Hitting the block displays another message that goes unused in the final game (ID #0180). The version of the message that is used here lacks only a D-Pad icon.

Ys romX 0 w1-2 08.png Ys romX 0 w1-2 09.png

The box contains five coins.

After the Shy Guys, a hidden zone reveals more Piranha Plants and a star that, when collected, detaches Baby Mario from Yoshi and lets the player control him. He is invincible, but the egg that contains Yoshi and the Baby Mario sprite use a wrong palette.

Also, Baby Mario's sprite is displayed floating on the ground, but his collision is correctly positioned on the ground. Probably the sprite of the transformed Baby Mario was taller in earlier builds or this is simply a mistake made by the developers. When the transformation of Baby Mario ends, Yoshi can stay separated from him without losing Time Points.

Ys romX 0 w1-2 10.png Ys romX 0 w1-2 11.png Ys romX 0 w1-2 12.png

In this level Baby Mario cannot continue running straight because an obstacle obstructs his way, but he cannot ground pound to remove it.

Ys romX 0 w1-2 13.png

Removing the obstacle reveals another hidden area with a door in it.

Ys romX 0 w1-2 14.png

The door leads to an underground area that contains two ? Clouds (the first contains one or two Time Points, the other one spawns a ring made of coins). There is also a door (leads to the very top area of the level) and a Flower that can only be collected by ricocheting an egg from a charged throw and hoping that it hits the Flower on its way.

Ys romX 0 w1-2 15.png Ys romX 0 w1-2 16.png

If Yoshi manages to re-enter the door that fell down when entering this area, before it disappears, he will be warped to the top-left corner of the World 1-1 (this glitch still exists in the final game).

Ys romX 0 WarpGlitch.png

The area on the top of first hidden area features more Piranha Plants. Using the bouncing arrows, a cliff can be reached.

Ys romX 0 w1-2 17.png

In one of the ? Clouds Yoshi can find an Helicopter morph bubble. Before Yoshi transforms, Baby Mario briefly becomes a strange-looking baby with a hat that uses a magic wand to transform Yoshi.

Ys romX 0 w1-2 18.png Ys romX 0 w1-2 19.png

Now Helicopter Yoshi can reach the very top of the level and touch a WARP block that warps Baby Mario and the collected eggs and gets transformed back to Yoshi. The ? Clouds in this area spawn a ring made of coins, except for the central one that appears to do nothing.

Ys romX 0 w1-2 20.png Ys romX 0 w1-2 21.png

If Yoshi can't transform or he fails to reach the WARP block before the time ends, he needs to access this area by navigating the hidden parts of the level, as the morph bubble doesn't respawn.

Ys romX 0 w1-2 22.png

To complete this level Yoshi needs to find a hidden area, then he must keep moving on the right until finding two ? Clouds. The door that spawns leads again to the top-left corner of the World 1-1.

Ys romX 0 w1-2 23.png Ys romX 0 w1-2 24.png Ys romX 0 w1-2 25.png

To reach the GOAL ring, Yoshi must hit the cloud on the right to spawn a staircase, hit the other cloud on the top, then reach the floating platforms and go to the GOAL ring.

Ys romX 0 w1-2 26.png

World 1-3

Ys romX 0 & ys rom 0 D w1-3 Preview.png
W1-3 map(s)
1st room (level $02) W1-3 1st room (level $02)

A level featuring Shy-Guys On Stilts, a pretty straightforward level.

World 1-4

Ys romX 0 & ys rom 0 D w1-4 Preview.png
W1-4 map(s)
1st room (level $03) W1-4 1st room (level $03)
2nd room (level $32) W1-4 2nd room (level $32)
3rd room (level $51) W1-4 3rd room (level $51)

World 1-5

Ys romX 0 & ys rom 0 D w1-5 Preview.png
W1-5 map(s)
1st room (level $04) W1-5 1st room (level $04)

An earlier version of 1-5: Hop! Hop! Donut Lifts.

World 1-6

Ys romX 0 & ys rom 0 D w1-6 Preview.png
W1-6 map(s)
1st room (level $05) W1-6 1st room (level $05)

Would be retooled for 2-3's second room in the final.

World 1-7

Ys romX 0 & ys rom 0 D w1-7 Preview.png
W1-7 map(s)
1st room (level $06) W1-7 1st room (level $06)

A short level that was probably the basis for the final World 2-7 (Lakitu's Wall), as it features a similar preview icon.

Ys romX 0 w1-7 01.png Ys romX 0 w1-7 02.png Ys romX 0 w1-7 03.png

Apart from the usual enemies, it features the Huffin Puffins (an adult with two chicks), a Slugger, a Green Glove, and several Wall Lakitus.

Ys romX 0 w1-7 04.png Ys romX 0 w1-7 05.png

The two Huffin Puffin chicks can be used as a replacement for eggs like in the final version.

Ys romX 0 w1-7 06.png

Unlike the final game, the Wall Lakitus cannot be defeated by stomping on them. They can only be defeated using eggs, even when the pump launches them from the ground.

Ys romX 0 w1-7 07.png Ys romX 0 w1-7 08.png

The other sections of the level feature more walls with Wall Lakitus inside them and other enemies on the ground.

Ys romX 0 w1-7 09.png Ys romX 0 w1-7 10.png Ys romX 0 w1-7 11.png Ys romX 0 w1-7 12.png

After the last part of the level with Wall Lakitus, the level can be completed by touching the GOAL ring.

Ys romX 0 w1-7 13.png

World 1-8

Ys romX 0 & ys rom 0 D w1-8 Preview.png
W1-8 map(s)
1st room (level $07) (see version with correct lava tiles) W1-8 1st room (level $07)
2nd room (Boss: Salvo) (level $33) W1-8 2nd room (Boss: Salvo) (level $33)