Bowser's Proposal

After arriving at Peach's Castle in the Mushroom Kingdom, Bowser tries to woo Peach with a regular proposal first, including saying a line he felt wouldn't work "I guess love makes a guy come out of his shell". However, Peach calls out his BS due to Bowser taking over multiple kingdoms before that, to which then he has Kamek harm Toad with an electric spell attack to coerce Peach into marrying him to spare the rest of the Toads.

Example of:
And Now You Must Marry Me