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Proto:Super Mario World 2: Yoshi's Island/ys rom 0 D

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

Yoshi's Island (ys rom 0 D) Title screen.png
Hmmm...
To do:
There's way too much duplicate info here. This page should only cover the differences from the previous prototype build. Additionally, the Audio Differences need proper comparisons.

The ys_rom_0_D prototype of Yoshi's Island was found in the July 24, 2020 Nintendo leak. Dated December 19, 1994, it's rather similar to the ys_romX_0 build from the same leak, though a number of changes have happened in the two weeks since that build.

To get the ROM working, change 30 to 20 at 0x7FD5 to correct the header. Depending on the emulator, you may also need to change 03 to 05 at 0x7FBD.

General

Countless differences that were in the ys_romX_0 build also apply here, so below are the changes in this build:

  • Yoshi builds up momentum much faster than in ys_romX_0, though his top speed is still slower than in the final.
  • Some stages either had minor alterations, or were replaced entirely.
  • The items that get preloaded into the inventory under File 1 have corrupted graphics in this build, but still work as intended.
  • The title screen logo was replaced with a larger simplified design. It was reverted to the previous logo in the final game.

Audio Differences

Despite now featuring the music and sounds from Yoshi's Island, the audio is still far from being finalized. For one, there's no level start music.

Music

Some tracks are different.

Map

Proto Final

The level select uses a different rendition of the prologue theme from the final release that features more instruments.

Score

Proto Final

The score music lacks percussion.

Game Over

Proto Final

The game over jingle is missing a few instruments.

Player Down

Proto Final

The death jingle lacks the first three notes, while the last two notes end at a different pitch.

Sounds

Hmmm...
To do:
Rip the "hurry up" fanfare and any sounds that are different compared to the final in question.

There are countless missing sounds (like the lack of a sound for selecting a level), but some still contain notable differences.

  • When the Baby Mario timer reaches below 10, a Yoshi's Island-style rendition of the Mario series' "hurry up" fanfare plays and the level music speeds up. The music will go back to normal once you get the timer above 10 again.
  • Different sound for the end-of-level Flower roulette.
  • Different sound effect for losing a second of the Baby Mario timer.

Levels

While most levels have barely had any changes since the ys_romX_0 build, there are still some changes that happened. Note that all levels in this build use the same music, which was retained for some levels of the final version (most famously "Touch Fuzzy Get Dizzy").


Ys romX 0 & ys rom 0 D w1-8 Preview.png
World 1
The world of gooey blobs.
Ys romX 0 & ys rom 0 D w2-8 Preview.png
World 2
Move over Piranha Plant! Ghost Plants are where it's at!
Ys romX 0 & ys rom 0 D w3-1 Preview.png
World 3
That's a lot of turtles...
Ys romX 0 & ys rom 0 D w4-1 Preview.png
World 4
Poochy strikes back!
Ys romX 0 & ys rom 0 D w5-8 Preview.png
World 5
You've heard of lunar rabbits, now get ready for lunar ravens!
Ys romX 0 & ys rom 0 D w6-8 Preview.png
World 6
Look, it's from Baby Bowser!