A promotional Pokémon card from the Japanese Supervision set, Alien is classified at Unknown rarity and currently carries a market value of $0.00. Collectors encounter it primarily as a niche curiosity tied to the Supervision print run rather than mainstream play or high-value trading. Grading and sales history are minimal or absent, so condition and provenance strongly influence any future valuation. It is most relevant to specialists who document obscure or promotional Pokémon releases.