156 known values for skin with current usage counts:

1. default (22077× used)
2. red (16664× used)
3. green (11149× used)
4. follower (4217× used)
5. clown (1161× used)
6. trapper (1034× used)
7. vampire (872× used)
8. lab_apprentice (800× used)
9. cool_cap (691× used)
10. helmet_banana (553× used)
11. snowman (551× used)
12. daisy (551× used)
13. og_white (475× used)
14. anniversary (452× used)
15. rural_fella (414× used)
16. party_hat (392× used)
17. gingerbread (307× used)
18. panda (228× used)
19. gift_box (222× used)
20. monk (214× used)
21. pumpkin (213× used)
22. black_dog (192× used)
23. og_purple (183× used)
24. dog (166× used)
25. anniversary_2 (162× used)
26. builder (160× used)
27. edm (157× used)
28. toaster (139× used)
29. demon (135× used)
30. tea_cup (124× used)
31. og_yellow (118× used)
32. cyborg_3 (113× used)
33. og_pink (108× used)
34. cyborg_1 (91× used)
35. bad_cap (89× used)
36. grim_reaper (89× used)
37. reindeer (88× used)
38. green_spikes (86× used)
39. elf (85× used)
40. detective (76× used)
41. wizard (67× used)
42. evil_bot (65× used)
43. king (65× used)
44. narwhal (64× used)
45. cubix (64× used)
46. joker (60× used)
47. grey_cat (60× used)
48. orca (60× used)
49. mad_scientist (59× used)
50. sushi (58× used)
51. yeti (52× used)
52. headset (51× used)
53. cat (50× used)
54. spikes (49× used)
55. mummy (49× used)
56. peach (49× used)
57. eliminated (48× used)
58. white_demon (48× used)
59. rplace (45× used)
60. security_bot (44× used)
61. parrot (44× used)
62. ninja (40× used)
63. anniversary_3 (40× used)
64. shades (40× used)
65. fries (40× used)
66. angel (39× used)
67. siren (38× used)
68. lunar_dragon (38× used)
69. murica (37× used)
70. bow_tie (37× used)
71. wolf (33× used)
72. alien (31× used)
73. top_hat (31× used)
74. country_nl (30× used)
75. cyborg_2 (28× used)
76. astronaut (27× used)
77. devil (27× used)
78. ghost (26× used)
79. shark_attack (24× used)
80. apple (22× used)
81. icefox (22× used)
82. whale (22× used)
83. festive_lights (21× used)
84. ramen (21× used)
85. bee_costume (21× used)
86. treasure_chest (20× used)
87. monkey (18× used)
88. country_de (17× used)
89. rabbit (17× used)
90. country_us (17× used)
91. block (17× used)
92. bunny_costume (16× used)
93. tiger (16× used)
94. scuba_diver (15× used)
95. curious_bot (15× used)
96. cow (15× used)
97. blue_dinosaur (15× used)
98. bandit (15× used)
99. firefox (14× used)
100. boby (14× used)
101. country_fr (13× used)
102. science_adept (13× used)
103. burger (12× used)
104. pirate (12× used)
105. country_pl (12× used)
106. banana (11× used)
107. country_gb (11× used)
108. mecha (11× used)
109. dinosaur (11× used)
110. leprechaun (11× used)
111. country_au (11× used)
112. carrot_costume (11× used)
113. country_se (11× used)
114. spy (11× used)
115. shape (10× used)
116. country_be (10× used)
117. steampunk (10× used)
118. country_il (10× used)
119. country_fi (9× used)
120. burglar (9× used)
121. mark (8× used)
122. fairy (7× used)
123. country_cz (7× used)
124. unicorn (7× used)
125. country_ro (7× used)
126. country_no (7× used)
127. nutcracker (6× used)
128. country_gr (6× used)
129. firefighter (6× used)
130. red_cocoa (6× used)
131. polar_bear (6× used)
132. graffiti (6× used)
133. country_it (6× used)
134. country_es (5× used)
135. country_ca (5× used)
136. jailbreak (5× used)
137. hamster (5× used)
138. country_hu (4× used)
139. country_ch (4× used)
140. alice (4× used)
141. pineapple (4× used)
142. pig (4× used)
143. green_cocoa (4× used)
144. country_ru (4× used)
145. fossil (4× used)
146. country_hr (3× used)
147. cardboard_box (3× used)
148. popcorn (3× used)
149. country_si (3× used)
150. stinger (3× used)
151. laurel (2× used)
152. white_crown (2× used)
153. blue_crown (2× used)
154. black_crown (2× used)
155. yellow_crown (1× used)
156. buffalo (1× used)