The weight of a yellow spotted lizard is 12 to 13 pounds
Since you know they're not real, WHY would you ask a question about how much they weigh? Since no one could have ever weighed something that does not exist, there's no way for anyone to give you a sensible answer. It's like asking how many fairies can dance on the end of a needle or how much hay a unicorn needs per year.
The "yellow spotted lizards" in the movie version of "Holes" were played by Bearded Dragons, a popular(and harmless)pet species, with CGI enhancements to make them look fierce, which they aren't. You can Google "Bearded Dragon" to get information on the average size and weight of this species, though it varies a lot, since like dogs, they are selectively bred in different sizes as well as colors.
The "yellow spotted lizards" in the movie version of "Holes" were played by Bearded Dragons, a popular(and harmless)pet species, with CGI enhancements to make them look fierce, which they aren't. You can Google "Bearded Dragon" to get information on the average size and weight of this species, though it varies a lot, since like dogs, they are selectively bred in different sizes as well as colors.