Called "Gunsou Gattai Kerobot V" (軍曹合体 ケロボットＶ) XD
Produced by Bandai. All 5 types, with special names for the machines as well:
* Keroro & Z Commander
* Tamama & Z Tiger
* Dororo & Z Wing
* Giroro & Z Hawk
* Kururu & Z Panther
Listed on Amiami to be released in March at 3,990 Yen per set (inclusive of tax).
Images are from Toysdaily.
Also, one new image of a future gashapon set from Bandai: R-Style Tengen Toppa Gurren Lagann announced earlier this month.
All 3 types featuring Yoko, Nia and Yoko Space. 90mm tall each.
9 figures per set. April release, 6,615 Yen per set (inclusive of tax).
Image is from Amiami.