Poms are extremely adapted humans. They first arrived on The Isle of Pom about 34,000 B.C. On the island, there were extremely powerful goats that enjoyed ramming anything that moved. The only people who survived were those who could endure being rammed into at 80mph by a 100lb goat. Thus, over 36,000 years, the poms were created. PomPom's full name is "PomPom da Thn MkKna." "PomPom" means "he who has the greatness of more than 2 poms(people) stuck together" ("PomPom is the best pom" is therefore redundant). He was named so because of his great wisdom. "da Thn" means "the third", as he was the third in history of the poms. The other poms see him as some kind of seer. "MkKtna" means "of the Katana tribe". His parents (Gnrl and Frwln, pom's names don't usually have many vowels) were so proud of him that they first got him a Karate teacher, Oda Jonouchi, then sent him to the mainland to get an education. There he met Homestar, and they've been best friends ever since. If PomPom got poked, it would only deflate him, because he is full of a spongy material that contains Helium.

Ratio of PomPom's weight:
Actual body: 80%
Spongy stuff: 18%
Helium: 2%

Ratio of PomPom's volume:
Actual body: 10%
Spongy stuff: 30%
Helium: 60%
To see the reason Homestar says "And some pretty tight pants", go here:
/"Tight" Pants