Sonic Rush sprite ripping guide (.bac)

[Chor64]

So yeah, i have recently been searching the internet, and i havent found a way to easily rip Sonic Rush's sprites; So that's why i decided to do some research and figure out a way to properly rip Sonic Rush's sprites.

What i found

In my research, i first tried Tinke which allowed me to extract the raw files and preview the sprites; but the preview wasn't perfect as it could only get the first frame of the sprite and didn't get the size of the sprite correctly.

Later i found a bunch of python scripts related to Sonic Rush's file formats, which caught my attention; it converted the .bac file perfectly (with the right size) but again it just converted the first frame.

So then i figured that i must create my own tool that extracted all the frames. For that i used c# and the source code of Tinke and the python scripts as a guide.

Step 1: Extracting

First you need to extract the raw files of the game; For that i use tinke-ultimate which is a fork of the original Tinke.

To extract the files with Tinke you must first open the executable which will instantly prompt you with an open dialog, where you have to find your dumped DS game.

After Tinke finishes opening the file, it should look something like this:
   
Now you want to search for the file you want to extract.
*Most of the in-game sprites are in the "act" folder and are in the .bac file extension.

If you want to preview the selected file, click on "View". The preview will probably look like a mess; to fix it try adjusting the Width of the preview to values like 4, 8, 16, 32, 64, 128, 256 or other multiples of two, since those are common sizes of sprites.

Now finally, if you found the file you want to rip, press the "Extract" button and save it where you want.

Step 2: Converting

Because i havent found a tool that converted a .bac file to a common image format, i made it myself. It can be found here.
*Note that this might not work with all sprites.

To convert your file, you just have to drag and drop the .bac file into the executable. It will extract all the frames of the bac file with their corresponding sizes.

The program will export images with the names FrameX and FrameX_SubFrameY. You can think of Frames being the diferent animations and the subframes as the additional frames of those animations.

And you are done! you successfully ripped your sprites from Sonic Rush.
Also, this is my first post in the forums.