I'm trying to remember the name of an old toy that I used to have when I was a kid. It was around in the mid to late 90s. It was a series of ninja action figures that you could make fight each other. They each had a little button on their chest that, when pressed, would make them pop off the base they were attached to. In that sense, they functioned almost like rock them sock them robots. Please help me remember then name of this toy.