I believe he is referring to the rare TV occurences that come up when you defeat the Weak Five a few times. I do believe that is a glitch because I didn't battle the W5 for a few months, and then wanted to mix berries with the Master Blender again so I started beating down the W5 many times and still didn't get any TV news.
As for the berries, you should know that they don't stay on the tree forever. Each berry has its own growth period and if you don't pick them within the proper time period, they drop back into the soil. Some I have had grow back after time, but I some some of the rare berries will not. You need to make sure that you water your berry during every stage and pick it when it is done.