Since no such compilation of what the sounds are is in the ZIP file or the comments already, here's what I could gleam by a skim-through. The left 2 numbers are the BANK numbers. Some of these seem to be unused data; perhaps a further, in-depth look is required for the sake of discovering unused content in games.

Note I couldn't figure out the location of sounds such as the hammer SFX, some of the attack FX sounds, the FP recovery, and other stuff of the sort; those, I couldn't find during my skim-through.

00 - instruments
01 - instruments
02 - instruments
03 - instruments
04 - instruments, samples
05 - instruments, samples (INSTR_0008_SND_0000 seems like it may be unused...?)
06 - instruments (vaguely xylophone)
07 - instruments
08 - instruments (gettin' sick of these yet?)
09 - instruments
0A - instruments
0B - instruments
0C - instruments
0D - instruments (yeah, i'm gettin sick of these too.)
0E - instruments
0F - instruments
10 - instruments
11 - instruments (dojo's fighting ambience sfx)
12 - voices? (one seems to be saying "hey..." and the other seems to be saying "what?" or "whoa?" possibly unused...)
13 - twinkle (that's all this is)
14 - instruments
15 - instruments (this is the last regular instruments i know of...)
16 - instruments, samples, unknown (one seems to be the drums of jade jungle... perhaps the dev team was hesitant about their beat, so they compiled a short loop for them to insert later?)
17 - happy chime (...that's all this one is; it only has one sound.)
18 - boing (...and that's all this one is, too. just a lone fuzzy boing.)
19 - menu opening/closing, menu scrolling, ? balloon, ! balloon, misc. menu, misc. (some sfx seem to be for other non-menu/common cutscenes...?)
20 - partner swapping, menu opening, bow's outta sight, sushie's water block/squirt
1A - stats bar rolling down, heal HP, ching, text end, menu option, dingdong, text scroll,
1B - menu selection, twinkles, misc. (some unknown)
1C - pipe entry, jump, overworld, spin/tornado jump, whiffs, misc. (some unknown)
1D - attacks, unknown (attack down via chill out, and a zip sound, but i dunno some)
1E - shooting stars, running water, waves, birds, misc. (i dunno some?)
1F - attacks, tattle opening, SMW-style stomp, misc. (i dunno some again)
21 - unknown (some whistles, a whiff, and a paff)
22 - unknown (maybe attacks?)
23 - some doors
24 - some doors, misc. (riveting?)
25 - attacks, misc. (i can't tell most)
26 - battle, sleeping, misc. (the run, enemy defeated, and some other sfx are here)
27 - attacks
28 - trains, misc (some revolve the dry dry mountains train and the shy guy toybox train)
29 - gameshow, huff puff machine, misc. (gameshow sfx are present; some sounds like the paper unfolding are present)
2A - battle, using recovery items/repel gel, ding, unknown (recovery item usage is at INSTR_0006_SND_0000)
2B - unknown (some overworld, maybe?
2C - battle, star spirit focus, star spirit summon, star spirit card hum, misc. (some unknown?)
2D - unknown (some water flowing?)
2E - forever forest, misc (stuff like the forever forest bushes and ambient sounds are used here)
2F - cutscene, overworld, misc. (some might be unknown? i don't recognize some)
30 - unknown (seems to be some misc. sfx)
31 - unknown (possibly attack sfx?)
32 - unknown (given the following too, possibly overworld sfx, but might also be attack sfx)
33 - overworld (stuff like leaving the pipes or getting hit by lava/the thorn vines are here, odd/possibly unused sound at INSTR_0001_SND_0000?)
34 - overworld (the jack-in-the-boxes from shy guy's toybox are present)
35 - zaps, misc. (INSTR_0008_SND_0000 seems to be the crowd cheering via levelup)
36 - attacks, unknown (the status infliction sounds are there)
37 - unknown (possiby attacks)
38 - battle jingles and unknown (some attack fx sounds are here, including the unused F one... and, oddly, the lucky jingle?)
39 - misc. (plips and plops and shings; could really be anywhere)
3A - attacks, misc. (some seem unknown)
3B - unknown? (possibly attacks)
3C - attacks
3D - attacks, misc. (i dunno about some)
3E - attacks (seems to have the sounds for the poof for lakilester's cloud nine)
3F - unknown (maybe ambience or cutscene sfx?)
40 - unknown (possibly cutscene sounds; there's a bell chinging sound not unlike a twinkle)
41 - unknown (possibly attacks? i don't really recognize these)
42 - attacks, clicks, and some shy guys toybox sfx (the shy guys screaming's in there, some other unknown sfx too)
43 - attacks (enemies)
44 - attacks (enemies)
45 - unknown (some magic sounds and other snippits... perhaps used by crystal king or in some attacks?)
46 - unknown (a "pff" and a rumble)
47 - fanfares + opening/closing the file select menu (item obtaining, start menu)
48 - ambient sounds

We need enemy sounds into one folder,and others go seperate.

There is little to no organization to this at all. It's 950+ sounds all lumped together with no discernible naming convention. Still, it seems everything's there, even if it takes a lot of searching (and luck).