From Bulbapedia, the community-driven Pokémon encyclopedia.
||January 16, 2004
The Metagross Constructed Starter Deck (Japanese: 構築済みスターター メタグロスデッキ Pre-built Starter Metagross Deck) is a Japanese-exclusive Half Deck that complements the Undone Seal expansion of the Pokémon Trading Card Game.
The majority of these cards could not be found in the main expansion. Those that were not were added to the main set when the English version was made.
Like many other Half Decks, the Metagross Constructed Starter Deck also includes a rulebook, damage counters, status counters, and a custom coin.