
Rumble and Frenzy's ground-pounders (what do they call them?) come with these little end-cap things that they snap into. Each one looks like two little cups attached together, and has a small clip that looks like it's intended to clip onto something. I'm guessing maybe it clips onto SW somewhere. Anyone know what I'm talking about and can anyone tell me what they're for?
Bonus question: Why is Frenzy lavender instead of blue?