Hi, sorry if my English isn't great.

I'm trying to get textures from Danball Senki W (PSP) and I'm stuck on a compressed file. I'm not a programmer, just doing this as a hobby, so please bear with me.

what I already did:
-extracted the game's CPK with VGMToolbox
-found MRON3.00 containers inside
-wrote a QuickBMS script that extracts entries from MRON (32-byte entries, 6-byte tag, 2-byte ID, 4-byte offset, 4-byte size). It works.
-inside MRON I found PSMF videos, nested MRON, and SLZ compressed data

Now I'm stuck on SLZ.(( The block I'm looking at is split between two MRON files (0002 and 0003), so I merged them and cut out the SLZ stream into one file.

The header starts like this:

53 4C 5A 02 00 01 24 00 38 28 00 00 30 86 00 00
00 00 00 00 20 00 00 00 01 40 10 00 00 00 00 00

what I think it means

-"SLZ" + type 2
-uncompressed size = 0x2838 (10296)
-packed size = 0x8630 (34352)
-header size = 0x20 (32 bytes)
I tried a lot of tools and scripts, none worked (slz.bms by aluigi (expects PACK, doesn't match), slz_triace.bms (reads header, fails on second block, saves nothing), slz_chunks.bms (just copies data), CUE's SLZ decompressor v1.1 (doesn't recognize signature), QuickBMS comtype slz_02 (needs 16-byte header, ours is 32), several Python LZSS attempts with different offset/length bit layouts, inverted flags, both endiannesses. Nothing valid came out.)

Someone on GBAtemp mentioned a Capcom SLZ variant with inverted flags (0x00 = literal, 0x01 = match). I tried that too, but maybe I got the offset/length formula wrong.
I think this might be a Level-5 custom version of tri-Ace SLZ type 2 (LZSS + RLE/FILL), maybe chunk-based instead of a single stream.

Here is the file! https://limewire.com/d/eV7Dt#3kshB5t6pr
(slz_one.bin, 34384 bytes = 32-byte header + 34352 packed bytes)

If anyone could take a look and tell me what the correct bit layout is, or share a working script, I'd be really grateful. I can provide more samples if needed.
Thanks a lot!

Edited 1 hour ago1 hr by momoseiki

just took a look and pretty sure i have it cracked however can't fully test because i'm pretty sure your file is missing something somewhere

provide more samples or take a look at how you're extracting the files to make sure it's not cutting off anything.

Edited just now1 min by Hazza12555