What is pokemon theta emerald?

Pokemon Theta Emerald is a fan-made ROM hack of the original Pokemon Emerald, developed by LCCoolJ95. It includes updated graphics, new music, new trainers, and Pokemon from all 7 generations. The game also features new events, such as a Delta Episode and a Battle Frontier inspired by Pokemon Platinum. Additionally, Mega Evolution is available for many Pokemon, allowing them to temporarily transform into stronger forms. The game is highly regarded by fans of Pokemon ROM hacks and is considered one of the best examples of a complete overhaul of the original game.