History WMG / TheGrinchGrinchesTheCatInTheHat

If Whoville is on a dust speck and the Grinch lives north of Whoville, then obviously he's microscopic. The ''real'' Cat in the Hat keeps Little Cat A under his hat, who is like the Cat himself but small enough to fit under his hat. Then Little Cat A keeps Little Cat B under his hat, then Little Cats C, D, E, and so on. This would mean that Little Cat Z, the last one, is tiny enough to be the same height as the Grinch. Which begs the question: why didn't he just use his Voom on the Grinch?

After his mother died, his father grew angry and bitter. He then created the Grinch’s Oath and taught it to his son. The face in the mirror is Grinch Sr.(He says “That’s my boy!” of the Grinch.), but he appears in the mirror because the Grinch has metaphorically become his father.

After his loving mother died, his father grew angry and bitter. He then created the Grinch’s Oath and taught it to his son. The face in the mirror is Grinch Sr.(He says “That’s my boy!” of the Grinch.), but he appears in the mirror because the Grinch has metaphorically become his father.

[[the Grinch’s heart shrank after the death of his mother.]]

His reflection bullies him and alters his behavior? Check. He sees a hallucination of his mother in a puddle? Check. Has violent mood swings and an aversion to loud noise? Check and check. It could be a number of issues but the likeliest diagnosis is schizophrenia.

Just as the Grinch saw his mother in the puddle of teardrops, he sees his father in the mirror. While his mother was a good person, the Grinch ended up emulating his horrible father.