Revealed in Dengeki Black Maoh back in mid March, 1/1 HoiHoi-san Mini with HoiHoi Carry has just being announced, but it's going to be a limited release for Dengekiya and Kotobukiya's own direct stores in Japan.
In short, this will be a Japanese limited release. ^^;
About 85mm tall. Apart from HoiHoi-san Mini and HoiHoi Carry, option spread palms, Gatling gun for HoiHoi-san and a pump gun are also included.
Pre-order on Dengekiya will end on August 31st. Also available for pre-order from Kotobukiya's direct store in Akihabara (Radio Hall), Tachikawa, and Nihonbashi in Osaka.
Late November release, 3,675 Yen (inclusive of tax).
Images are from Dengekiya, Kotobukiya, Kotobukiya-Hayamimi Blog.