I would like to know the best way to display flash messages in Kohana v3?
Some tutorials or examples would be helpful.
Do you mean like Kohana 2.x's flash session variables?
The latest Kohana supports get_once() which is pretty similar to the old flash session variables.
$session = Session::instance();
$session->set('test', 'Hello, World!');
// The session variable is returned and removed.
$test = $session->get_once('test');