3DS 0004003000008202 (O3DS JPN Home Menu) has BannerDS_LZ.bin and other banner models. BannerDS_LZ.bin has a nice DS cart model and textures.
Decrypted/extracted the 7.1.0J fw update data from SoniPro Super Sonico in Production. =^-^=
Responses
In response to blip #100410
0004013800000102 is TWL_FIRM. While there's no romfs, extracted firm_0_18000000 has a bunch of files in the code.bin.
darc (archives, layout)
MsgStdBn (text)
CFNT (32 fonts?!)
CWAV (sound wav)
SSEQ (sound sequence)
DVLB (shaders)