Yeesh, these are unlabeled. Gonna try to update chat with it, even though the Remake has HQ audio for chars

Bowser's lines (Scott Burns) are id 561-590. Surprised how many there are that aren't reused from Double Dash, wonder if some are unused. Even more odd that he's first...

591 is Mario oddly pitched
592-646 are standard Mario's (Charles Martinet)

Interestingly, the filtered Doopliss alts are right after, IDs 647-658. Some unused...

659-679 are Princess Peach lines (Jen Taylor)

For Generic audio...

9-11 are rumbling water splashes for the sewer

12 is a zipper

13 is for when you activate the first crystal star in the sewers

14 and 15 are the confirmation and incorrect buzzer sounds for Special Moves/Attacks

16 is a stock swish

17 is the Famicon startup jingle

18 is a stock bush rustle

19-27 are sounds relevant to the first TEC/Peach scene (from the beeps to shower)

28-30 are bird chirps

31-32 are water drips for the Sun/Moon stone areas in Shhwonk's Fortress and other similar wet places

33-34 are animal sounds for the Keehaul Jungle area

35-36 Crashing waterfall or waves, likely for Keehaul

37-38 are lowpass filtered hums. I think for cave areas

39: Water splatter, likely inside Keehaul

40-44 Ocean and water sounds

45-46: Metal clinking, for coins?

47-50: Train sounds for the Rogueport Express

51-52: More water for dungeons/sewers

53-57: Low pass filtered ambience for wind. I think for the way to Hooktail's Castle

58-61: Weird distorted spring sounds. Almost sounds like attack sfx

62: Cannon

Will look at iconic sfx later...

If you want to find a specific sound quickly, just use foobar2000 and put every .wav in it. Sort the files in descending order and by duration and loop manually through every "long" file (the ones longer than 1 sec). For the sounds shorter than 1 second, let foobar2000 play them one by one and stop it when you found the sound you want.
The total length of every sound should be like 30 min (considering there are 1200 audios and the average length of 1 audio is 1 second long, 1200 seconds/60=20min but some sounds are longer than 1 second) long so you should be able to find what you want in less than that.

But I still understand why the complaints.

@Coleburner87: Any idea how ridiculously time-consuming it would be to listen through and identify over a thousand sound effects?

PLEASE NAME YOUR SOUNDS PLEASE!