I've always adored Kecleon, and this is absolutely wonderful! I've always wanted to see them in more colors than green and purple too, and the black Shiny one looks amazing.
great, but actually chameleons don't change colour to match the surroundings. it's all on emotional states, which you also mentioned. loving this series by the way!
the last 2 lines of the first paragraph under the black one seem odd... "In battle, attacks that have have been made against the adaptable Pokemon change its type" upon re-reading, it's "have" being there twice that is what caught me
"In battle, attacks that have have been made against the adaptable Pokemon change its type"
upon re-reading, it's "have" being there twice that is what caught me