Disabling Tails for certain levels...

You'll need to find the code which defines which levels Tails is or is not loaded in and modify it.

 

4E 75

:E

 

Not quite, Fiz. It's slightly more subtle than that. It'll be something like this:

Code (Text):

1. if(level == SkyChase)
2. {
3.  ? ?/* do not load Tails */
4. }
5. else
6. if(level == WingFortress)
7. {
8.  ? ?/* do not load Tails */
9. }
10. else
11. if(level != DeathEgg)
12. {
13.  ? ?/* load Tails */
14. }

You'll be looking, broadly speaking, for something like this:

CMPI.B LevelNumber,RAMAddressOfLevel
BEQ CommandToRemoveTails
CMPI.B LevelNumber,RAMAddressOfLevel
BEQ CommandToRemoveTails
CMPI.B LevelNumber,RAMAddressOfLevel
BNE CommandToAddTails

 

Before Tails' code, add code that 4e75s if level is XX XX

 

I've already said it won't be as simple as putting in a bunch of RTS commands. There'll be a system already in place to decide if Tails is or is not loaded.

 

QuickMan: I was kidding. e_e

 

And I was following Gerbil's prerequisite.

 

Actually, it's easy. I had it documented at the Freedom Shack, but I lost my notes when it went down. I will try and figure it out again.

 

In Sonic 2 rom:
Go to $4480, you will see this:
0C 38 00 06 FE 10 67 34 (WFZ)
0C 38 00 0E FE 10 67 2C (DEZ)
0C 38 00 10 FE 10 67 24 (SCZ)
Delocate this data somewhere under your rom with 4E F9 XX XX XX XX thing and add your level to the list. Don't forget at the end of your data, there will have two 4E F9 XX XX XX XX thing:
One for adress $4498 and one for adress $44BC.
Example, this is your new data, XX is your level:
0C 38 00 XX FE 10 67 20
0C 38 00 06 FE 10 67 18
0C 38 00 0E FE 10 67 10
0C 38 00 10 FE 10 67 08
4E F9 00 00 44 98 4E 75
4E F9 00 00 44 BC 4E 75
I hope this will fully answer your question.