... For a few episodes... Still! This is exciting, for me XD
Monthly Japanese manga magazine, Televi-Kun, has confirmed in their latest issue that on September 14th and 21st the original trio will be reuniting for two special episodes! In the episodes Ash & Pikachu will briefly return to Kanto, where the long time friends will battle it out! Misty is confirmed to have Mega Gyarados on her team, while Brock will have a Mega Steelix.
Source: pokejungle.net