Maxwell can make many friends during his adventure, collecting their Friendship Cards to prove it.

1. Professor
2. Clunkee
3. Jeeko
4. Teeko
5. Squirm
6. Precise
7. Paddy
8. Wolfin
9. Mordecai
10. Bones
11. Aelia
12. Girl
13. Crox
14. Apo
15. Juicy
16. Roland
17. Plestro
18. Tommy
19. Chopo
20. Whippy
21. Tutu
22. Starbi
23. Blue Yamo
24. Stalk 'n' Stem
25. Wilbo
26. Chip
27. Flayne
28. Witch
29. Rachael+Deb
30. Surban
31. Karl
32. Dong
33. Dubelle
34. Ding
35. Totummy Citizens
36. Bingo
37. Gramma
38. Jenovi
39. Zookeeper
40. Xex
41. Spatchi
42. Klik
43. Bomsae
44. Harpon
45. Cropett
46. Sbooch
47. Gee
48. Draw
49. Landlord
50. Johan
51. Banban + Tootie
52. Sage
53. Zaggy
54. Bug Hero
55. Kitpan
56. Nuyu
57. Perchi
58. Plug
59. Annaconda, Mowman & Sawyer (Bounty Hunters)
60. Petrias
61. Cherub Gal
62. Cherub Guy
63. Alby
64. Azure
65. Mamacuda
66. Planck
67. Bollybrain