AbilityCamouflage
If any basic Energy card attached to Kecleon is the same as the Attacking Pokémon's type, any damage done by attacks from the Pokémon to Kecleon is reduced by 40 (after applying Weakness and Resistance).

Kecleon is Pokédex #352, generation 3 (Hoenn). Kecleon is a Basic Colorless Pokémon with 70 HP. The card lists level 28.
Kecleon sits at 52/132 in Secret Wonders, position 52 of 132. Before it is 51 Ivysaur, and after it is 53 Kirlia. The set belongs to the Diamond & Pearl series. It was released on November 1, 2007. The printed size is 132, and the checklist is the same length. The listed rarity is Uncommon.
Camouflage is listed as Poké-Body. If any basic Energy card attached to Kecleon is the same as the Attacking Pokémon's type, any damage done by attacks from the Pokémon to Kecleon is reduced by 40 (after applying Weakness and Resistance). The attack Blind Scratch lists 60 damage. The cost is Colorless, Colorless. Flip a coin. If tails, this attack does no damage to the Defending Pokémon. Instead, this attack does 20 damage to 1 of your Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Fighting +10. Retreat cost is 1. The flavor text reads "It can freely change its body's color. The zigzag pattern on its belly doesn't change, however."
Kecleon (#352) has 11 other cards in the catalog. Those other cards are in 9 sets. The other printings with a release date run from 2003 to 2025. The earliest other card is Kecleon 18/100 in Sandstorm (2003). That card lists 60 HP, and this one lists 70 HP. The rarity there is Rare, and here it is Uncommon. Kagemaru Himeno illustrated that card, and Mitsuhiro Arita illustrated this one. 7 other cards of Kecleon list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 other cards in the catalog with that illustrator.
Secret Wonders set binder is where a full Secret Wonders set goes. This card fills one slot there. A generation binder holds one card of each species. Kecleon can fill a slot in Generation 3 binder (Hoenn). Themed lists that include this exact card are Mitsuhiro Arita cards. I still need this card.
If any basic Energy card attached to Kecleon is the same as the Attacking Pokémon's type, any damage done by attacks from the Pokémon to Kecleon is reduced by 40 (after applying Weakness and Resistance).
Flip a coin. If tails, this attack does no damage to the Defending Pokémon. Instead, this attack does 20 damage to 1 of your Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
It can freely change its body's color. The zigzag pattern on its belly doesn't change, however.
Secret Wonders, in the Diamond & Pearl series. It was released on November 1, 2007. The printed size is 132.
52/132. It is entry 52 of 132 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Uncommon.
Kecleon #352, generation 3 (Hoenn).
Blind Scratch (60).