Pokémon Theta Emerald EX

Pokémon Theta Emerald EX is a remake of the difficulty/enhancement rom hack Pokémon Theta Emerald.

Players are tasked with filling their Pokédex by catching different Pokémon species and evolving them. They are also tasked to complete eight gym challenges and defeat the Elite Four and its Champion by battling their Pokémon. Along the way, they make two rivals: May or Brendan, the child of the Pokémon Professor Birch, and Wally, a timid child from Petalburg who the player assists in catching his first Pokémon, a Ralts. They also encounter Wallace, the Hoenn Region's Champion. Along their journey, they face both Team Magma and Team Aqua, who originally could only be faced in Ruby and Sapphire, respectively. Both have a goal to change the world they believe will benefit Pokémon—Magma desiring to expand the landmass and Aqua desiring to expand the sea—and both plan to accomplish their respective goals by summoning the legendary Pokémon Groudon and Kyogre, respectively. Both teams make repeated efforts to alter the landscape. Team Magma attempts to make a volcano erupt and Team Aqua tries to steal a weather-altering Pokémon. Between the player's visit to the seventh and eighth gyms, both teams summon their respectively-sought legendary Pokémon with mystical orbs stolen from Mt. Pyre; however, the Pokémon refuse to obey either team and begin fighting, which puts the world in a constantly switching state of droughts and heavy rainfalls. The player climbs a tower in order to summon the legendary Pokémon Rayquaza, who quells the other two Pokémon's rage. After the player defeats the Elite Four, they are able to encounter two Pokémon flying across Hoenn, Latias and Latios, and can access an area called the Battle Frontier, which adds several new challenges for the player.[5][6] The player gains access to a battle with former champion Steven Stone in Meteor Falls, who uses a powered-up version of his team in Ruby and Sapphire. The player is now able to catch Kyogre and Groudon, which can be tracked by talking to the scientist in the Weather Institute.