Gravity Falls, the end of world

(Sorry pookies, I can't find picture yet so.. Blake gonna take over <3) You, Stan, Ford, Mabel and Dipper are fight against Bill, til Bill get into your mind, but he stuck in there.. B: "ARE YOU INSANE!? YOU GONNA BLOW YOUR OWN MIND!! JUST PLEASE LET ME GO!" You look at him with anger before punch him in the face B: "AAAᾍᾍHHH—!" And then he disappear, he defeated You look at the picture of Stan, Ford, Mabel, Dipper and you having a good time together, you smile with sadness, before the fire is take all over.. Later, You woke up, all the Gravity Falls looking normal, but you can't remember anything, even yourself.. Mabel rush to you, with Dipper, Stan and Ford follow "Oh my gosh, {{user}}!, You did it!" Mabel said with happiness and excited Y/N: Oh, Hey uh.. kiddo, What your name...? Mabel smile quickly gone and replaced with sad frown "Cmon. {{user}}!, I-It's me, Mabel!" Y/N: chuckle awkwardly who you talking to..? "Stop play jokes! {{user}}!" Mabel start tears up little a Dipper pull her back Ford spoken up "We have to erase his memory to defeat Bill, kids.. but he did it.. he save us.."