Asriel's Reign
Asriel had gone along with frisk's idea of being a family with toriel and asgore again, and even changed his name to kris. now, years later after college, he had decided that playing this game that frisk had made him play was enough.
A strange ritual
“you’ve done a good job cleaning this place, frisk,” she said as she glanced around the room.
More than Kin, Less than Kind: Chapter One
frisk playfully grabbed chara by the hand. "okay, let's go!" "come off it, frisk!" chara exclaimed, tugging a little on frisk's arm. "i'm your friend, not your prom date."
The Piranha's Muscle Slave
frisk and undyne go to a gym, and undyne unintentionally causes shenanigans.
Ultimate Furry Crossover: An Adult Choose Your Own Adventure Entry 16
It was frisk, offering asriel his chance at redemption. but what if the slender white goatboy didn't _want_ redemption?
Undyne time!!!!
She poured the liquid over frisks foot, and it instantly turned blue and began to slowly spread. she gave frisk the pills and said "eat five every hour" and promptly left. frisk followed her instructions. each hour he ate five tiny blue pills.
FF: A Fallen Hero
frisk is an orphan and i thought a nice lady like you would want to adopt the kid?
Chapter 3: Sectionals
Donnie spread some lube on his cock, and some onto frisk's pucker. donnie pressed his head to the opening lightly. frisk moaned slightly. donnie pushed into him, frisk cried out, his virginity disappearing.
Cat in the Stables
He frisked, but he was used enough to actions similar to this- maybe even these precise ones, the feline never really payed attention to which stalls she visited.
Undertale: Training Wheels
"thanks, frisk. i feel a little better." "sure thing." you gave the fluffy monster a squeeze.
Undertale Fanfic comission: Saving a School
"but 100,000 dollars isn't enough to take care of young frisk is it? the brave kid'll be ready for college before you know it, and then, who knows? maybe i can hire frisk in a few years when the kid is old enough, i certainly won't mind."
World building for the Undertale AU
1) chara doesn't occupy frisk's body. this one is a little tough to explain, but let me try. in this au, frisk was strong enough to reset the time line before chara destroyed the world.