KiKi KaiKai (奇々怪界, lit. "Mysterious Ghost World") is a series of multi-directional scrolling shooter video games by Taito.
Its sequels were released in the West as Pocky & Rocky on the Super Famicom/SNES consoles and were developed by Natsume with Taito as publisher.
This tag implicates kiki_kaikai_(series) (learn more).