Doubutsu no Mori: Ice Climber

A version of Ice Climber with a special letter from Takashi Tezuka and a Famicom Disk System item distributed on a Controller Pak, via magazine giveaways. It is a very rare item, only two giveaways are documented to have happened, distributing 30 Controller Pak each. It could only be played in Doubutsu no Mori, on its built-in NES emulator.