Whats it's biology?
Kecleon is a bipedal, reptilian Pokémon that is usually green. On either sides of its head are yellow frills, which are connected by lines to its yellow lips and rings around its eyes. There are small ridges on its shoulders and a red zigzag stripe around its midsection. The hands and feet have three short digits each, and it has yellow soles. It also has a long skinny tail that is usually curled tightly in a spiral.
What are the major appearances?
Two Kecleon debuted in The Kecleon Caper, making Kecleon the first Generation III Pokémon to appear in the anime. These Kecleon were owned by Madison and Alexa, who nicknamed them Reddy and Greeny. They tried to foil Team Rocket's attempt to steal their owners' belongings.
What are the minor appearances??
A Kecleon appeared in Now That's Flower Power!, under the ownership of a Pokémon Coordinator. A Coordinator's Kecleon appeared in Pros and Con Artists.
Are there NPC appearances?
Yes. Pokémon Pinball: Ruby & Sapphire: Kecleon has the first Bonus Field on the Ruby Field. It will turn invisible, though a Devon Scope can be knocked out of the tree to make it visible for a short time. Kecleon must be knocked over and then hit with the ball ten times in two minutes to win the round.