Dragon Ball Kai (2014) - episode 2 - 12 Apr, 2014

As Videl is called in to stop a bus hijacking, Gohan, using the alias "Great Saiyaman", pitches in to help the passengers while Videl handles the criminals. The next day, Gohan learns that Chobi, the child of Toto, the pterodactyl, has been captured by a circus and put on display. In his attempt to rescue Chobi, Gohan is portrayed as a criminal and is pursued by Videl. However, when Chobi's parents attack the city in search of their child, Gohan manages to handle the situation and return Chobi to his parents. Later, Videl, who discovers the truth that Gohan is Great Saiyaman, blackmails him into participating in the 25th World Martial Arts Tournament. As some of the other Z Fighters express interest in the tournament, Goku calls out from the Other World, saying he will return to Earth for a single day to participate. (Source: Wikipedia)