I have two games in memory but can't find them.
NES: As a kid I had a Famiclone shaped like the N64 Controller. It had a Vertical Scroll shmup that I'm not sure if I'm confusing it or if I'm imagining it. It's not B-Wings, Xevious, Twinbee or Hector, but you flew across a blue background with islands and structures. Haven't found it. Probably a Chinese/Hong-Kong bootleg.
ARCADE: I remember playing a Horizontal Scroll shmup that had color labeled powerups. Red, Blue, Green, Yellow and Purple. Each color had one type of bullet and you could mix two. I remember picking always Red + Blue which made the ship shoot homing missiles.
I've already went through the entire MAME 2010 and FBNEO Arcade Games (yes, literally checked every single shmup rom from both romsets) and never landed at that particular game. It's not Gradius, Darius, R-Type, Zero Wings...