39. He has a great knowledge about Mad Snail Disease.
40. He has a great knowledge about submarines.

41. He doesn't wear a shirt

42. He went to college with Flatts.

43. He doesn't have his pants pulled up.

44.He's A Star!

Someone already said that!

45. The inner machinations of his mind are an enigma.

47. He changes his underwear.

48. He can make furniture out of sand

49. Blanks out a lot

50. Would wake up himself early in the morning for a Krabby Patty

1. He's stupid.
2. He's funny.
3. He's SpongeBob's friend.
4. He wants to be like SpongeBob.
5. He's not normal.
6. He helps SpongeBob.
7. He has a funny laugh.
8. He bothers Squidward.
9. He can get crazy.
10. He's the smartest guy SpongeBob knows.
11. He beat Larry in an election.
12. He wears an "I'm with stupid" shirt.
13. He's pink.
14. He has a funny voice.
15. He says, "Hi, I broke my butt."
16. He lives in a rock.
17. He can't make up his mind about how he wants his house decorated.
18. He doesn't even know who his real parents are.
19. He doesn't have a nose.
20. He's a great mentor.
21. He adds comedy to the show.
22. He's fat.
23. He forgets about the people he's referring to.
24. He has royal blood in him.
25. He's pink!!!
26. He's a chubby pink starfish.
27. He's an idiot.
28. He can blow a bubble that covers an entire city.
29. He's the funniest character on the show.
30. He's a star.
31. He has stupid parents.
32. He likes jellyfishing.
33. He's a bubble master.
34. He's so fat he's strong.
35. He's so dumb we can fool him.
36. He has an unnatural talent to grow hair.
37. He can't do anything right.
38. He doesn't have a brain.
39. He has a great knowledge about Mad Snail Disease.
40. He has a great knowledge about submarines.
41. He doesn't wear a shirt.
42. He went to college with Flatts.
43. He doesn't have his pants pulled up.
44. He's a star!
45. The inner machinations of his mind are an enigma.
46. He's a star and his last name is Star.
47. He changes his underwear.
48. He can make furniture out of sand.
49. He blanks out a lot.
50. He would wake himself up early in the morning for a Krabby Patty.

I guess the list is complete.

He's a starfish.