=8 years later=
Sans : Its time for Frisk to arrive.
Sans exits the training room and teleport to the place where classic sans meet her. Everything went like undertale frisk defeat Toriel , meet sans , defeat undyne and defeat Asgore .Asriel got defeated like the classic but he didn't die as sans heal him . Using medical magic aka medicine and some plot armor.
Toriel : My child your alive *cry* that good , it's a wonderful news that your alive.
Asgore : MY child your alive *cry* your alive your alive .
Asgore said as he and Toriel was kneeling hug Asriel crying tears of joy.
Unlike the game the end was not the end .
???: Brother your alive I see hehehe.
They turn around and see frisk acting up strange she was changing color between green and blue . Until it stop at green. And it was Chara or was it.
Chara : Hello brother how have you been.
Chara show a smile that was full with killing intent. Asgore and Toriel flinch when they feel it . As their kind and cheerful daughter show intent to kill them it doesn't make sense. But with Asriel didn't feel it cuz he feel so happy to see his sister was alive . When he wanted to ask how she's been but he was interrupted.
Chara : I been better if you wanted to ask. I was in a BLACK VOID FOR 8 YEARS FOR 8 YEARS! But there was a man , a man that teach me magic , train me there he told me the truth . The truth about this world, and it has to do have you.
Pointing at sans . All the people was confused and sans stand there emotionless .
Sans : Is that so , is gaster the guy you talk about. If he is , your wrong to believing him, he's crazy . I warned him that if he stayed there for too long he will go crazy and have false memory.
Sans told her the truth but Chara respond with.
Chara: haha haha , he told me you said that and you wanted to rule this world so he sent me to destroy this world so he can remake it without people like you and the cop that kill me. ALL EVIL SHALL BE GONE! But don't worry he said that he will revive you guys and my family except sans after the cleansing. So now let's fight.
Sans : he he hehehe he got so corrupted that he that got idea like that . haha haha so funny seems like I will won the bet that I have with him.
Then Sans look at chara.
Sans : you kid need help and I will give it to you.
_Sans theme start_
Sans right eyes lights up with red and yellow color. Then Sans snaps making all people in the room sleep .
Sans: let's dance.
Chara charge at sans summoning knife around her like Gilgamesh. Unlike Frisk , Chara can use magic because she has learn it for years in the void and gaster also give Chara lessons that made her magic stronger.
Chara shoot the knife at sans but sans dodge it with ease . Chara got close and swing the knife but was block with a bone. Chara was shot back with blue magic.
Sans summon bluster and shot at her . Which she out ran , sans stop shooting then summon a storm full of bone . This time Chara can't out run it and took some damage . Chara use ice cream to heal then run to sans. Sans use a bone to fight her in close combat. Sans had been training while waiting for frisk .
______________________
-Stats-
Name: Thunder / sans
AP(attack power): 190 + 80
DP(defense power): 2 + 4
AP(agility point): 30 + 30
MP(mana point): 60 + 200
Bonus point: 0
Store-World Create-Quests
______________________
Sans : Kid you got great moves, if you get some lv I sure that you might be able to force me to go serious for a minute.
Chara : Not going to happen I ain't going to a killer .
Sans : But your killing me and everyone in the world. Even if you bring them back you still kill them.
Chara : There's no free things in the world . If I want something I need to be willing to pay it.If killing everyone is the price I willing bear with it even no body know. THAT'S HOW DETERMINED I AM!
Sans : ..... Ok let's get serious.
Sans eyes light up as he's getting to end the fight.
________________________________________________ This was a hard chapter as I need to fasten the pace but keep it long as well. Sorry for short chapter I was lazy to write all frisk adventure and the first time I write this I was going to end it in one chapter the fight. But I thought about it and decided it's better to make it 2 chapter long. Good Damn its hard . Can't feel the pain when reading. What ever hope you enjoy the chapter sorry there's only one today.