I love thinking about how the Pokemon world works.Ya know what? Since he is a fire type, I guess this means whenever he needs to heat up, he can just do it himself instead of going out into the sun to warm up and regulate his temperature??? In the winter, he will be fine as well.
Unlike real cold blooded lizards.
It probably never gets cold where he lives, though. He dwells in a tropical climate that's temperate year-round. And in that region, he appears to inhabit the sulfur fields of a volcano. Lots of fire and noxious gas perfect for a Poison/Fire-type.