Originally posted by GeminiRage
It means you're using a headerless ROM, which isn't supported by the YIEntrance tool to my knowledge.
Worry not, there is a way to change your entrance position through hex editing.
Starting at xBF471 in a headerless ROM, you can find a table of level starting entrances. They are arranged in sets of four bytes.
-First byte is the level index number (in other words, the level number that you'd see in Golden Egg)
-Second byte is the X coordinate of the starting position.
-Third byte is the Y coordinate of the starting position.
-Fourth byte is the level that is opened upon completion. It's recommended you leave this byte alone...
And then it goes to the next level in order after the fourth byte.
So let's take a look at the first set of bytes in the table
00 07 77 01
This means the level will go to Level 00, which is "Stage 1-1: Make Eggs, Throw Eggs". It will start you off 0 screens and 7 tiles to the right, and 7 screens and 7 tiles down. You can ignore that last byte, it's not important.
The next set of four bytes after that would be for Stage 1-2's starting entrance, and the four bytes after that one would be 1-3's, and so on... An easy way to find the entrance you want to modify is to just look for the level index number of the stage you've claimed, and change the coordinates according to Golden Egg's screen boundaries and tile grid view.
Honestly, I think this stuff about level starting entrances should be added to the Useful Information post.
Worry not, there is a way to change your entrance position through hex editing.
Starting at xBF471 in a headerless ROM, you can find a table of level starting entrances. They are arranged in sets of four bytes.
-First byte is the level index number (in other words, the level number that you'd see in Golden Egg)
-Second byte is the X coordinate of the starting position.
-Third byte is the Y coordinate of the starting position.
-Fourth byte is the level that is opened upon completion. It's recommended you leave this byte alone...
And then it goes to the next level in order after the fourth byte.
So let's take a look at the first set of bytes in the table
00 07 77 01
This means the level will go to Level 00, which is "Stage 1-1: Make Eggs, Throw Eggs". It will start you off 0 screens and 7 tiles to the right, and 7 screens and 7 tiles down. You can ignore that last byte, it's not important.
The next set of four bytes after that would be for Stage 1-2's starting entrance, and the four bytes after that one would be 1-3's, and so on... An easy way to find the entrance you want to modify is to just look for the level index number of the stage you've claimed, and change the coordinates according to Golden Egg's screen boundaries and tile grid view.
Honestly, I think this stuff about level starting entrances should be added to the Useful Information post.
You sure there's no tool for adding a header to a YI rom? I could have sworn there's a tool for that...
Just so you know, I'm very active on the site anymore like I was before; I'm mainly on Discord now.