I make an Undertale AU

Hi, like I was said, I make an Undertale AU but it's not finish yet. It is about Asgore and Gaster trying to break the barrier using Frisk and other souls. But Chara didn't fall yet in the underground. Frisk was the first person to fall and he (yes I make Frisk a boy) joined Dreemurr family. Then yes, Gaster didn't disappear, he and Asgore thought about "what if we try to Frisk to break the barrier?" So they trying to catch Frisk's soul and they did it. But Toriel and Asriel noticed it and they, actually Toriel because Asriel is 14, tried to stop them. Toriel knew a spell to take Frisk's soul and she did but Frisk's soul absorbed the power of Toriel to stay alive and that's why most of Toriel's powers are diminished. But she couldn't do it and Gaster toke Frisk's soul. While Gaster begins to manipulate his soul, Asgore Toriel and Asriel banished them so that they wouldn't interfere with their work. After 3 years, Gaster done with the soul of Frisk and Frisk gains new powers. And Asgore and Gaster tried him to break the barrier, but he couldn't do it beacuse his soul became a corrupted soul. While they wait one year to resting, Chara fell the underground. (Chara is a boy too) he confused about where is he right now and Toriel and Asriel took care of him. But Asgore noticed Chara was fell down to his lands, he send Frisk to take him for break the barrier. Remember, Frisk couldn't do it because his soul became a corrupted soul... That's why he is going to take Chara's soul and they will try to break the barrier. And that's it. I hope I can find scenarios for that :,3