The Grinch Grinches the Cat in the Hat

The Grinch wakes up in a good mood one morning until his reflection speaks to him, prompting him to repeat the "Grinch's Oath", reminding him of his evil nature. The Cat in the Hat goes on a picnic, and their paths cross when the Grinch bumps into him, leading to a fierce car chase after the Cat insults the Grinch. The Cat has a psychiatric session with the Grinch to find out what makes him mean-spirited, but they eventually come up with a plan to change the Grinch's ways by reminding him of his mother's love, which brings the Grinch back to happiness and he dismantles the anti-lighthouse device that had been causing chaos.