Papyrus - Dummy Destroy and Wall Gash

That was why it was so upsetting to see what remained of Undyne's practice dummy after his last attack. Bits of musty old stuffing floated through air around them like snow. Splinters of wood and bits of burlap were embedded in the cavern wall.

“Oh, no,” he muttered to himself, raising a hand to his mouth in alarm.

“Oh, YES!” Undyne hooted and clapped at his side.

“I'm sorry, Undyne,” Papyrus said, as he was swept up into a crushing bear-hug. “I'll get you a new one.”

Undyne spun wildly, making Papyrus dizzy despite the lack of an inner ear. “Who cares about the dummy, dummy! That was hard-core!”

Papyrus braced himself for the suplex he knew was coming, but Undyne merely set him decisively back on his feet and affectionately head-butted him.

“WOOOOO!”

“Yeah, uh, woo,” Papyrus said, unable to muster up much excitement. “I sure did some property damage, all right.” He rubbed at his forehead. She'd restrained herself; it would only ache for a couple hours.

“HELL YEAH, you did!” Undyne jogged over to the wreckage that had been, up until a couple minutes ago, her outdoor training salle. She ran her hands over the crack in the wall, exclaiming over how deep it was. Bits of stuffing and rock dust settled in her ponytail and stuck to her gills. She coughed to dislodge them. “Man, that dummy got wrecked!”

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Flowey is Not a Good Life Coach, Chapter 3