Fleck is the best friend of Dave and also makes videos with him.
Fleck in "The Blowing"
In the iCarly episode iQuit iCarly, the boys begin to fight after Fleck spray paints Dave's dad's car purple. They reunite after saving Carly and Sam from near death.
Fleck has a personality similar to Sam's; he sometimes acts reckless without considering the consequences, and thinks that entertainment is most important to a show, not safety (much like Sam).