In Japan, this card was first available as a glossy Unnumbered Promotional card on a two-card insert alongside Surfing Pikachu in the September 1997 issue of CoroCoro Comic, released on August 15, 1997. A mail-in prize draw offering another copy was published in the December 1998 issue of Bessatsu CoroCoro Comic Special, released in late October 1998. People wishing to enter the prize draw were required to affix the application ticket on the bottom left of the article page to a postcard and send it to Shogakukan. Two thousand winners were sent a set of five mounted cards on two plain sheets: Imakuni? and Super Energy Retrieval on one; Computer Error, Lt. Surge's Electabuzz, and Erika's Dratini on the other.
A version of Imakuni? on regular card stock was given away during the first Tropical Mega Battle, held at the Hilton Hawaiian Village in Honolulu, Hawaii between August 24 and 27, 1999. It is possible Tomoaki Imakuni himself gave away these cards as he used them in his "Confusion Deck" when playing people casually in-costume at the event. It was later reprinted and reclassified as a Supporter card with updated artwork in the Japanese EX Battle Boost subset. This print no longer features Hit Points and the additional text at the bottom of the card is replaced by the Supporter card rule. This print was later released in the Generations expansion, originating from the Japanese BREAK Starter Pack.