STINGER!!!

I have such fond memories of this. The first stage boss was a giant watermelon who shot seeds at you in various exploding formations. 2P co-op was terrific, as was the alternation between ridiculous side scrolling and ridiculous top-down levels, and the dumb powerups you could get by bouncing bells repeatedly with your gun. I seem to recall that nothing about this game made any sense whatsoever.

Konami, where did you go wrong?