You saw this coming.

Credits to Fasgort for the gameplay footage, DededeTheMudkip for rendering the vid for me, FocusSight445 for making the thumbnail and translations, and juliekarbon for making the battle box background.
Fasgort: https://www.youtube.com/user/Fasgort
DededeTheMudkip: https://www.youtube.com/user/DededeTheMudkip
FocusSight445: http://twitter.com/FocusSight445
juliekarbon: http://juliekarbon.tumblr.com/post/131021257797/undertale-fight-box-template-since-many-of-you

Source: Several Cookie☆ movies / Manatsu No Yo No Inmu
Song: Toby Fox - Nyeh Heh Heh, Toby Fox - Bonetrousle

YouTube: https://www.youtube.com/watch?v=YFic_XE561g