Complex sentence: In the Pokémon Anime, Burned Tower is full of Ghost Pokémon belonging to the gym leader, Morty because he is in charge of taking care of that tower and has made it part of the Pokémon gym.
Split into simpler sentences: In the Pokémon anime, Burned Tower is full of Ghost Pokémon belonging to the gym leader, Morty. He is in charge of taking care of that tower and has made it part of the Pokémon gym.