This card was first released at the 1999 "Electronic Entertainment Expo" (E3) convention held in Los Angeles (May '99). Later, this card appeared in "Nintendo Power" magazine's September '99 issue with a much larger distribution.
Lv14 (Jungle Expansion) "W" Pikachu (1st Edition)
This card is a normal "Jungle" (Lv 14) Pikachu card with a small (foil) "W" stamp below the artwork. This card was first released in "The Duelist" magazine's September 1999 issue as a promotional insert.
Lv9 (Fossil Expansion) "W" Kabuto
This card is a normal "Fossil" (Lv 9) Kabuto card with a small (foil) "W" stamp below the artwork. This card was first released in "TopDeck" magazine's December 1999 issue as a promotional insert.
Lv15 (Jungle Expansion) "Gold Bordered" Meowth
This card is a normal "Jungle" (Lv 15) Meowth card with a gold colored border on the face of the card (instead of the normal yellow border). This card was first released in specially marked packages of Betty Crocker "Pokemon Rolls" fruit snacks packages. (Randomly inserted. Other possible cards from the packages are normal Base set commons: Bulbasaur, Charmander, Pikachu, Squirtle.)
Lv34 "PRERELEASE" Clefable
This card is a normal "Jungle" (Lv 34) Clefable (holographic) card with the word "PRERELEASE" stamped on top of the artwork. This card was first released to a select few test sites of the WOTC Pokemon TCG League.
Lv28 "PRERELEASE" Aerodactyl (1st Edition)
This card is a normal "Fossil" (Lv 28) Aerodactyl (holographic) card with the word "PRERELEASE" stamped on top of the artwork. This card was first released in October 1999 through the WOTC Pokemon TCG League.
Lv16 "Promo" Pikachu (Japanese)
Lv16 "Promo" Pikachu (U.S. "1")
This card is a (Lv 16) Pikachu (non-foil) card with a small (non-foil) "Promo" (star symbol with the word "Promo") stamp below the artwork AND a small number "1" in the lower right corner, where the rarity symbol normally would be (U.S. version only). This card was initially released in Japan as one of two promotional insert cards in "Hyper Coro Coro" magazine's May (Spring) Issue. (They are printed in English, but are recognizeable by the lack of the "1" card number in the lower right corner.)
Lv12 "Promo" Jigglypuff (Japanese) This card is a (Lv 12) Jigglypuff (non-foil) card with a small (non-foil) "Promo" (star symbol with the word "Promo") stamp below the artwork. This card was initially released in Japan as one of two promotional insert cards in "Hyper Coro Coro" magazine's May (Spring) Issue. (They are printed in English, but are recognizeable by the lack of any card number in the lower right corner.)
Lv20 "Promo" Electabuzz
Lv60 "Promo" Mewtwo
Lv13 "Promo" Pikachu
Lv43 "Promo" Dragonite
These cards are non-foil with a small (non-foil) "Promo" stamp (star symbol with the word "Promo" written across it) below the artwork AND a gold foil "Kids WB Presents Pokemon The First Movie" stamp on the upper right corner of the artwork. These cards have numbers instead of rarity symbols in the lower right corner of the card: Electabuzz = "2", Mewtwo = "3", Pikachu = "4", Dragonite = "5"
These cards were initially released as a promotional campaign accompanying the "Mewtwo Strikes Back" movie release in the United States in November 1999.