Has anyone used that travelling shop?

I've used one; it just opens up a shop window. You can't buy bullets/stars, but you can recharge.

I haven't seen the lie detector things, but that's probably because I just scrolled down.

cool! i might buy one so i can train on my sin at the top of cwk w/o having to get someone on my hs mule to door me so i can recharge. Do you know if it recharges cilbi?