The Akala Island Pokedex Consists of 160 Different Pokemon Species; however, many of which are also included in the other sections of The Alola Region Pokedex. Since your first adventure through the Alola Region, the Akala Island Pokedex has now been updated with a number of New Pokemon Entries.
Akala Island Pokedex
1. Pikipek
2. Trumbeak
3. Toucannon
4. Yungoos
5. Gumshoos
6. Rattata
7. Raticate
8. Caterpie
9. Metapod
10. Butterfree
11. Grubbin
12. Charjabug
13. Vikavolt
14. Bonsly
15. Sudowoodo
16. Happiny
17. Chansey
18. Blissey
19. Wingull
20. Pelipper
21. Crabrawler
22. Crabominable
23. Gastly
24. Haunter
25. Gengar
26. Zubat
27. Golbat
28. Crobat
29. Diglett
30. Dugtrio
31. Oricorio
32. Psyduck
33. Golduck
34. Magikarp
35. Gyarados
36. Barboach
37. Whiscash
38. Tentacool
39. Tentacruel
40. Finneon
41. Lumineon
42. Wishiwashi
43. Luvdisc
44. Corsola
45. Mareanie
46. Toxapex
47. Remoraid
48. Octillery
49. Mantyke
50. Mantine
51. Lillipup
52. Herdier
53. Stoutland
54. Eevee
55. Vaporeon
56. Jolteon
57. Flareon
58. Espeon
59. Umbreon
60. Leafeon
61. Glaceon
62. Sylveon
63. Mareep
64. Flaaffy
65. Ampharos
66. Mudbray
67. Mudsdale
68. Igglybuff
69. Jigglypuff
70. Wigglytuff
71. Tauros
72. Miltank
73. Surskit
74. Masquerain
75. Dewpider
76. Araquanid
77. Fomantis
78. Lurantis
79. Morelull
80. Shiinotic
81. Paras
82. Parasect
83. Poliwag
84. Poliwhirl
85. Poliwrath
86. Politoed
87. Goldeen
88. Seaking
89. Basculin
90. Feebas
91. Milotic
92. Alomomola
93. Fletchling
94. Fletchinder
95. Talonflame
96. Salandit
97. Salazzle
98. Cubone
99. Marowak
100. Kangaskhan
101. Magby
102. Magmar
103. Magmortar
104. Larvesta
105. Volcarona
106. Stufful
107. Bewear
108. Bounsweet
109. Steenee
110. Tsareena
111. Comfey
112. Pinsir
113. Hoothoot
114. Noctowl
115. Kecleon
116. Oranguru
117. Passimian
118. Goomy
119. Sliggoo
120. Goodra
121. Castform
122. Wimpod
123. Golisopod
124. Staryu
125. Starmie
126. Sandygast
127. Palossand
128. Omanyte
129. Omastar
130. Kabuto
131. Kabutops
132. Lileep
133. Cradily
134. Anorith
135. Armaldo
136. Cranidos
137. Rampardos
138. Shieldon
139. Blastiodon
140. Tirtouga
141. Carracosta
142. Archen
143. Archeops
144. Tyrunt
145. Tyrantrum
146. Amaura
147. Aurorus
148. Larvitar
149. Pupitar
150. Tyranitar
151. Phantump
152. Trevenant
153. Natu
154. Xatu
155. Nosepass
156. Probopass
157. Pyukumuku
158. Chinchou
159. Lanturn
160. Tapu Lele