there it is!
lacks secret steel soul boss, as well as shakra, but they're both included in the guide here.

1. Moss Grub
2. Massive Mossgrub
3. Mossmir
4. Moss Mother (Moss Grotto/Weavenest Atla)
5. Aknid
6. Skull Scuttler
7. Skullwing
8. Skull Brute
9. Skull Tyrant (The Marrow/Bone Bottom Event)
10. Kilik
11. Beastfly
12. Savage Beastfly
13. Caranid
14. Vicious Caranid
15. Hardbone Hopper
16. Hardbone Elder
17. Tarmite
18. Mawling
19. Marrowmaw
20. Hoker
21. Flintbeetle
22. Rhinogrund
23. Gromling
24. Grom
25. Bell Beast (The Marrow)
26. Pilgrim Groveller
27. Pilgrim Pouncer
28. Pilgrim Hornfly
29. Pilgrim Hulk
30. Pilgrim Bellbearer
31. Winged Pilgrim
32. Elder Pilgrim
33. Winged Pilgrim Bellbearer
34. Pilgrim Hiker
35. Pilgrim Guide
36. Overgrown Pilgrim
37. Covetous Pilgrim
38. Snitchfly
39. Lavalug
40. Lavalarga
41. Smelt Shoveller
42. Flintstone Flyer
43. Flintflame Flyer
44. Smokerocker Sifter
45. Deep Diver
46. Forebrothers Signis and Gron (Deep Docks)
47. Cragglite
48. Craggler
49. Brushflit
50. Fertid
'51. Flapping Fertid
52. Fourth Chorus
53. Skarrlid
54. Skarrwing
55. Skarr Scout
56. Skarr Stalker
57. Spear Skarr
58. Skarrgard
59. Gurr the Outcast
60. Last Claw
61. Skarrsinger Karmelita (Act 3)
62. Mite
63. Fluttermite
64. Mitemother
65. Dreg Catcher
66. Silk Snipper
67. Thread Raker
68. Moorwing (Greymoor)
69. Wisp
70. Burning Bug
71. Father of the Flame (Wisp Thicket)
72. Craw
73. Tallcraw
74. Squatcraw
75. Craw Juror (Craw Invitation/Court of Craws)
76. Tallcraw Juror (Craw Invitation/Court of Craws)
77. Squatcraw Juror (Craw Invitation/Court of Craws)
78. Crawfather (Craw Invitation/Court of Craws)
79. Muckmaggot
80. Slubberlug
81. Muckroach
82. Bloatroach
83. Roachcatcher
84. Roachfeeder

85. Roachkeeper
86. Roachserver
87. Disgraced Chef Lugoli (Bilewater)
88. Wraith (The Mist)
89. Mothleaf Lagnia
90. Miremite
91. Swamp Squit
92. Spit Squit
93. Stilkin
94. Stilkin Trapper
95. Groal the Great (Bilewater)
96. Barnak (Putrified Ducts)
97. Ductsucker (Putrified Ducts)
98. Pond Skipper (Shellwood)
99. Pondcatcher (Shellwood)
100. Shellwood Gnat (Shellwood)
101. Wood Wasp (Shellwood)
102. Splinter (Shellwood)
103. Splinterhorn (Shellwood)
104. Splinterbark (Shellwood)
105. Sister Splinter (Shellwood)
106. Phacia (Shellwood)
107. Pollenica (Shellwood)
108. Gahlia (Shellwood)
109. Shrine Guardian Seth
110. Nyleth (Shellwood)
111. Furm (Bellhart)
112. Winged Furm (Bellhart)
113. Pharlid
114. Pharlid Diver
115. Shardillard
116. Sandcarver (Blasted Steps)
117. Squirrm (Blasted Steps)
118. Judge (Blasted Steps)
119. Last Judge (Blasted Steps)
120. Coral Furm
121. Driznit
122. Driznarga
123. Pokenabbin
124. Conchfly
125. Great Conchfly
126. Crustcrawler
127. Crustcrag
128. Kai
129. Spinebeak Kai
130. Steelspine Kai
131. Yuma
132. Yumama
133. Karaka
134. Kakri
135. Yago
136. Karak Gor
137. Alita
138. Corrcrust Karaka
139. Crust King Khann
140. Watcher at the Edge
141. Voltvyrm
142. Drapefly
143. Drapelord
144. Drapemite
145. Giant Drapemite
146. Underworker
147. Underscrub
148. Undersweep
149. Underpoke
150. Underloft
151. Undercrank
152. Envoy
153. Choir Pouncer
154. Choir Hornhead
155. Choir Bellbearer
156. Choir Flyer
157. Choir Elder
158. Choiristor
159. Reed
160. Grand Reed
161. Choir Clapper
162. Clawmaiden
163. Memoira
164. Minister
165. Maestro
166. Second Sentinel (Act 3)
167. Dreg Husk

168. Dregwheel
169. Surgeon
170. Mortician
171. The Unravelled (Whiteward)
172. Cogwork Underfly
173. Cogwork Hauler
174. Cogwork Crawler
175. Cogworker
176. Cogwork Spine
177. Cogwork Choirbug
178. Cogwork Cleanser
179. Cogwork Defender
180. Cogwork Clapper
181. Cogwork Dancers
182. Vaultborn
183. Lampbearer
184. Scrollreader
185. Vaultkeeper
186. Trobbio
187. Tormented Trobbio (Act 3)
188. Penitent
189. Puny Penitent
190. Freshfly
191. Scabfly
192. Guardfly
193. Wardenfly
194. Broodmother
195. Driftlin
196. Mnemonid
197. Mnemonord
198. Servitor Ignim
199. Servitor Boran
200. Winged Lifeseed
201. Plasmid
202. Plasmidas
203. Plasmified Zango
204. Leaf Glider
205. Leaf Roller
206. Pendra
207. Pendragor
208. Nuphar
209. Cloverstag
210. Palestag
211. Kindanir
212. Verdanir
213. Escalion
214. Clover Dancers
215. Shadow Creepers
216. Shadow Charger
217. Gloomsac
218. Gargant Gloom
219. Void Tendrils
220. Void Mass
221. Wingmould
222. Garpid
223. Imoba
224. Skrill
225. Bell Eater
226. Huge Flea
227. Shakra
228. Summoned Saviour (Steel Soul Exclusive)
229. Garmond and Zaza
230. Lost Garmond
231. Pinstress
232. Widow
233. Phantom
234. First Sinner
235. Lace
236. Grand Mother Silk
237. Lost Lace

Mossgrub (1) - Moss Grotto, Mosshome, Memorium
Massive Mossgrub (2) - Memorium
Mossmir (3) - Moss Grotto, Mosshome, Memorium
Moss Mother (4) - Moss Grotto, Weavenest Atla)
Aknid (5) - Mosshome)
Skull Scuttler (6) - The Marrow
Skullwing (7) - The Marrow
Skull Brute (8) - The Marrow
Skull Tyrant (9) - Bone Bottom (Progression Tied), The Marrow
Kilik (10) - The Marrow
Beastfly (11) - Deep Docks, Hunter's March
Savage Beastfly (12) - Hunter's March, Far Fields (Wish-Tied)
Caranid (13) - The Marrow, Deep Docks
Vicious Caranid (14) - Deep Docks
Hardbone Hopper (15) - Deep Docks, Far Fields
Hardbone Elder (16) - Far Fields
Tarmite (17) - Far Fields
Mawling (18) - Moss Grotto, The Marrow
Marrowmaw (19) - Moss Grotto (Progression Tied), Memorium
Hoker (20) - Far Fields
Flintbeetle (21) - The Marrow (Wish-Tied)
Rhinogrund (22) - Pilgrim's Rest/Far Fields (Once), Memorium
Gromling (23) - Wormways
Grom (24) - Wormways
Bell Beast (25) - Marrow Bellway
Pilgrim Groveller (26) - Marrow, Mosshome, Choral Chambers, Bonegrave
Pilgrim Pouncer (27) - Mosshome, Marrow, Bonegrave, Blasted Steps
Pilgrim Hornfly (28) - Bonegrave
Pilgrim Hulk (29) - Far Fields
Pilgrim Bellbearer (30) - Bonegrave, Greymoor
Winged Pilgrim (31) - Shellwood, Bonegrave, The Marrow
Elder Pilgrim (32) - Bonegrave, Shellwood
Winged Pilgrim Bellbearer (33) - Shellwood, Greymoor
Pilgrim Hiker (34) - Blasted Steps
Pilgrim Guide (35) - Greymoor
Overgrown Pilgrim (36) - Mosshome
Covetous Pilgrim (37) - Bilewater, Shellwood
Snitchfly (38) - Bone Bottom (Act 3), High Halls, Pilgrim's Rest
Lavalug (39) - Deep Docks
Lava Larga (40) - Deep Docks
Smelt Shoveller (41) - Deep Docks
Flintstone Flyer (42) - Deep Docks
Flintflame Flyer (43) - Deep Docks
Smokerock Sifter (44) - Deep Docks
Deep Diver (45) - Deep Docks
Forgebrothers Signis & Gron (46) - Deep Docks
Cragglite (47) - Wormways (Post-Craggler)
Craggler (48) - Wormways
Brushflit (49) - Far Fields
Fertid (50) - Far Fields
Flapping Fertid (51) - Far Fields
Forth Chorus (52) - Far Fields
Skarrlid (53) - Hunter's March, Greymoor
Skarrwing (54) - Hunter's March, Greymoor
Skarr Scout (55) - Far Fields, Hunter's March, Greymoor
Skarr Stalker (56) - Far Fields, Hunter's March, Greymoor
Spear Skarr (57) - Far Fields, Hunter's Mach
Skarrgard (58) - Hunter's March
Gurr The Outcast (59) - Hunter's March (Act 3, Wish-Tied)
Last Claw (60) - Far Fields (Act 3, Boss Fight Exclusive)
Skarrsinger Karmelita (61) - Far Fields (Act 3, Boss Fight Exclusive)
Mite (62) - Greymoor
Fluttermite (63) - Greymoor
Mitemother (64) - Greymoor
Dreg Catcher (65) - Greymoor
Silk Snipper (66) - Greymoor
Thread Raker (67) - Greymoor
Moorwing (68) - Greymoor
Wisp (69) - Wisp Thicket
Burning Bug (70) - Wisp Thicket
Father of the Flame (71) - Wisp Thicket
Craw (72) - Greymoor
Tallcraw (73) - Greymoor
Squatcraw (74) - Greymoor
Craw Juror (75) - Act 3 Exclusive, Available through Crawfather
Tallcraw Juror (76) - Crawfather Exclusive (Act 3)
Squatcraw Juror (77) - Crawfather Exclusive (Act 3)
Crawfather (78) - Act 3 Exclusive, Requires Craw Summons to access (Greymoor, Craw Lake)
Muckmaggot (79) - Bilewater, Putrified Ducts. Use Pimpillo or Voltvessel to kill them.
Slubberlug (80) - Bilewater
Muckroach (81) - Sinner's Road
Bloatroach (82) - Bilewater
Roachcatcher (83) - Sinner's Road
Roachfeeder (84) - Sinner's Road
Roachkeeper (85) - Sinner's Road
Roachserver (86) - Chef Lugoli Bossfight, Sinner's Road
Disgraced Chef Lugoli (87) - Sinner's Road (Double Jump Required to Access)
Wraith (88) - The Mist
Mothleaf Lagnia (89) - Bilewater
Miremite (90) - Bilewater
Swamp Squit (91) - Bilewater
Spit Squit (92) - Putrified Ducts
Stilkin (93) - Bilewater
Stilkin Trapper (94) - Bilewater
Groal the Great (95) - Bilewater
Barnak (96) - Putrified Ducts
Ductsucker (97) - Putrified Ducts
Pondskipper (98) - Shellwood
Pondcatcher (99) - Shellwood
Shellwood Gnat (100) - Shellwood
Wood Wasp (101) - Shellwood
Splinter (102) - Shellwood
Splinterhorn (103) - Shellwood
Splinterbark (104) - Shellwood
Sister Splinter (105) - Shellwood
Phacia (106) - Shellwood
Pollenica (107) - Shellwood
Gahlia (108) - Shellwood
Shrine Guardian Seth (109) - Shellwood (Act 3)
Nyleth (110) - Shellwood (Act 3)
Furm (111) - Bellhart
Winged Furm (112) - Bellhart
Pharlid (113) - Blasted Steps, Choral Chambers
Pharlid Diver (114) - Weavenest Atla, Blasted Steps
Shardillard (115) - Sinner's Road, Deep Docks, Far Fields, Greymoor, Sands of Karak, The Marrow (Cannot be Farmed.)
Sandcarver (116) - Blasted Steps, Sands of Karak (Use Pimpillo when they appear out of the ground to kill them.)
Squirrm (117) - Blasted Steps (Above Bell Beast, Use Needolin to draw them out, or just be quick)
Judge (118) - Blasted Steps
Last Judge (119) - Blasted Steps
Coral Furm (120) - Sands of Karak
Driznit (121) - Blasted Steps, Sands of Karak
Driznarga (122) - Sands of Karak
Pokenabbin (123) - Sands of Karak
Conchfly (124) - Sands of Karak
Great Conchfly (125) - Sands of Karak
Crustcrawler (126) - Act 3 Exclusive, Sands of Karak
Crustcrag (127) - Memorium
Kai (128) - Sands of Karak, Act 3 Exclusive
Spinebeak Kai (129) - Sands of Karak, Act 3 Exclusive
Steelspine Kai (130) - Sands of Karak, Act 3
Yuma (131) - Sands of Karak, Act 3
Yumama (132) - Sands of Karak, Act 3
Karaka (133) - Sands of Karak, Act 3
Kakri (134) - Sands of Karak, Act 3
Yago (135) - Sands of Karak, Act 3
Karak Gor (136) - Sands of Karak, Act 3
Alita (137) - Sands of Karak, Act 3
Corrcrust Karaka (138) - Sands of Karak, Act 3
Crust King Khann (139) - Sands of Karak, Act 3
Watcher at the Edge (140) - Act 3, Sands of Karak. Awoken using Needolin.
Voltvyrm (141) - Sands of Karak (Voltnest). Easily accessible in Act 3, but available as early as Act 2.
Drapefly (142) - The Slab, Memorium
Drapelord (143) - Chance to spawn inbetween Memorium and Putrified Ducts, keep walking through to spawn.
Drapemite (144) - The Slab
Giant Drapemite (145) - Whispering Vaults, High Halls
Underworker (146) - Underworks
Underscrub (147) - Underworks
Undersweep (148) - Underworks
Underpoke (149) - Underworks
Underloft (150) - Underworks
Undercrank (151) - Underworks
Envoy (152) - Choral Chambers
Choir Pouncer (153) - Choral Chambers
Choir Hornhead (154) - Choral Chambers
Choir Bellbeareer (155) - Choral Chambers
Choir Flyer (156) - Choral Chambers
Choir Elder (157) - Choral Chambers
Choristor (158) - Choral Chambers
Reed (159) - Choral Chambers
Grand Reed (160) - Choral Chambers
Choir Clapper (161) - High Halls
Clawmaiden (162) - Choral Chambers, High Halls
Memoria (163) - Memorium
Minister (164) - High Halls
Maestro (165) - High Halls
Second Sentinel (166) - High Halls. (Must activate Second Sentinel in Cogwork Core using Cogheart Pieces, encounter in the world two or more times, and then take the "Final Audience" wish from Songclave to encounter.)
Dreg Husk (167) - Whiteward
Dregwheel (168) - Whiteward
Surgeon (169) - Whiteward
Mortician (170) - Whiteward
The Unravelled (171) - Whiteward; Accessed through using the Surgeon's Key, requires Grappling Hook to access.
Cogwork Underfly (172) - Underworks
Cogwork Hauler (173) - Underworks
Cogwork Crawler (174) - Cogwork Core
Cogworker (175) - Choral Chambers, Cogwork Core
Cogwork Spine (176) - Cogwork Core
Cogwork Choirbug (177) - Cogwork Core
Cogwork Cleanser (178) - Cogwork Core
Cogwork Defender (179) - Cogwork Core
Cogwork Clapper (180) - Cogwork Core
Cogwork Dancers (181) - Cogwork Core
Vaultborn (182) - Whispering Vaults
Lampbearer (183) - Whispering Vaults
Scrollreader (184) - Whispering Vaults
Vaultkeeper (185) - Whispering Vaults
Trobbio (186) - The Stage
Tormented Trobbio (187) - The Stage
Penitent (188) - The Slab
Puny Penitent (189) - The Slab
Freshfly (190) - The Slab, Broodmother

Scabfly (191) - The Slab
Guardfly (192) - The Slab
Wardenfly (193) - The Slab
Broodmother (194) - The Slab (Locked behind a wish)
Driftlin (195) - Mount Fay
Mnemonid (196) - Mount Fay
Mnemonord (197) - Found in Brightvein in Mount Fay. Requires Silksoar to access, Act 3 Exclusive.
Servitor Ignim (198) - Found in Weavenests
Servior Boran (199) - Found in Mount Fay
Winged Lifeseed (200) - Bonegrave, Wormways. Accessible after completing Alchemist's Assistant wish and later returning.
Plasmid (201) - Wormways, post Alchemist's Assistant.
Plasmidas (202) - Wormways, post Alchemist's Assistant
Plasmified Zango (203) - Wormways, post Alchemist's Assistant, found in Act 3
Leaf Glider (204) - Lost Verdania
Leaf Roller (205) - Lost Verdania
Pendra (206) - Lost Verdania
Pendragor (207) - Lost Verdania
Nuphar (208) - Lost Verdania
Cloverstag (209) - Lost Verdania
Palestag (210) - Lost Verdania
Kindanir (211) - Lost Verdania
Verdanir (212) - Lost Verdania
Escalion (213) - Lost Verdania
Clover Dancers (214) - Lost Verdania
Shadow Creeper (215) - The Abyss
Shadow Charger (216) - The Abyss
Gloomsac (217) - The Abyss
Gargant Gloom (218)
Void Tendrils (219) - The Abyss, entry must be found in Weavenest.
Void Mass (220) - Randomly in Act 3.
Wingmould (221) - Hornet's Dream (Act 3)
Garpid (222) - Ascent to The Surface. Use Silk Soar on the right side of the Cradle's Top.
Imoba (223) - The Ascent, See above.
Skirll (224) - The Surface
Bell Eater (225) - Royal Bellway, Act 3 Exclusive.
Huge Flea (226) - Top of Memorium
Shakra (227) - Former Moorwing Arena. Not necessary for Hunter's Memento, and can be missed if proceeding to Act 3.
Summoned Saviour (228) - Steel Soul exclusive, requires a Steel Soul exclusive wish to find. Required for Hunter's Memento in Steel Soul.
Garmond and Zaza (229) - Found below Songclave. Missable, and not required for Hunter's Memento.
Lost Garmond (230) - Blasted Steps, Act 3 Exclusive.
Pinstress (231) - Summit of Mount Fey, Act 3 Exclusive.
Widow (232) - Bellhart
First Sinner (233) - Found in the Slab, requiring the Apostate Key.
Phantom (234) - Found in The Mist.
Lace (235) - Deep Docks, The Cradle.
Grand Mother Silk (236) - The Cradle.
Lost Lace (237) - The Abyss.