BraveStarr S01 E01 The Disappearance of Thirty-Thirty

After an argument between Thirty-Thirty and BraveStarr, Thirty-Thirty heads to the Hall of Equestroids and goes back into the past. BraveStarr who becomes concerned over Thirty-Thirty's disappearance soon follows after him. When he finds him, the two only manage to get into another argument.