Thinks he's cool: Big Nate on Big Nate Island.
Cool but not to be trusted:
Shady Guy on Counterfeit Island
Director D on Spy Island
The "coolest character in the world" is a matter of personal opinion. My personal 'coolest character' is Roxas from the Kingdom Hearts video game series.
Jack and Kate are the two coolest characters in LOST.
Edward!
You have to buy one of the Greek god surfboards in the poptropica shops.I think the coolest is the Zeus one.
you have to complete islands or become a member to get better stuff.
Biography - 1987 Henry Winkler Hollywood's Coolest Character is rated/received certificates of: Argentina:Atp
Woods,bowman,and mason
Kisuke Urahara. 'Nuff said.
You have to buy a logo.
Link, from the Legend of Zelda series, is by far the the coolest videogame character ever. The Master chief, John 117, from Halo, comes second.
Biography - 1987 Henry Winkler Hollywood's Coolest Character was released on: USA: 19 June 2000
"Coolest" is perhaps too subjective to give a definitive answer although, one might argue it could be Bart.