Resident Evil 4 Remake: All 104 Treasures, 16 Castellans, 8 Small Keys Locations [Leon's Guide]

All 104 Treasures (DLC and Enemy Drop Treasures), 16 Castellans, 8 Small Keys, 19 Requests Locations in the new Resident Evil 4 Remake for Leon's campaign; if you're looking for Ada's click here ( • Resident Evil 4 Remake... ).
Useful Time Stamps:
[Chapters]
00:24 Chapter 1
06:16 Chapter 2
11:54 Chapter 3
19:24 Chapter 4
30:29 Chapter 5
36:06 Chapter 6
40:15 Chapter 7
47:02 Chapter 8
53:11 Chapter 9
01:04:12 Chapter 10
01:12:18 Chapter 11
01:16:58 Chapter 12
01:23:54 Chapter 13
01:32:14 Chapter 14
01:43:11 Chapter 15
01:50:37 Chapter 16
[Clockwork Castellans]
05:28 Castellan 1
09:33 Castellan 2
15:14 Castellan 3
23:30 Castellan 4
32:45 Castellan 5
37:32 Castellan 6
45:01 Castellan 7
50:40 Castellan 8
53:37 Castellan 9
01:10:19 Castellan 10
01:14:29 Castellan 11
01:21:29 Castellan 12
01:26:12 Castellan 13
01:42:08 Castellan 14
01:46:17 Castellan 15
01:52:52 Castellan 16
[Small Keys]
07:25 Small Key 1
11:42 Small Key 2
18:36 Small Key 3
23:50 Small Key 4
29:45 Small Key 5
49:34 Small Key 6
56:00 Small Key 7
01:17:02 Small Key 8
[Rhinoceros Beetles]
22:27 Rhinoceros Beetle 1
47:07 Rhinoceros Beetle 2
01:42:47 Rhinoceros Beetle 3