The point I'm making to you, is that Lilo and Stitch is actually more popular, overall, than movies made, by Disney alone, following The Lion King.
L&S's box office gross has been surpassed several times by movies released before it. But the box office isn't the only factor. Also factors are the NET gross, what the movie made after production costs were paid off (for example, a movie with a 100 million budget, making just 110 million at the box office, is a NET box office failure.)
then, movie rentals, purchases, merchandise, and other things which contribute to the franchise's overall earnings.
These things factored, the only true rival to Lilo and Stitch, is Tarzan, which was carried mostly by the strength of the Phil Collins soundtrack. But as far as merch sales go, that movie didn't do so well. But what about rentals and sales? I don't know, but I imagine they were fairly healthy for a while.
Did it surpass Lilo and Stitch? I don't think so. But Tarzan would really be the only true rival to Lilo and Stitch in earnings.
New Groove treaded water.
but, the only way to show this is to have these earnings averaged out on an average per-year income. Taken as totals, even some of the biggest disney flops would appear to do better than LS because they've been out longer. LS is only 2 years old. So we have to divide and make it an annual earnings to show the popularity.
Pocahontas itself could blow lilo and stitch away, in a gross-income sense...because of how long it has been around to accumulate DVD and VHS sales and rentals, though merch was never a hot seller for this movie.
See the formula?