Since I cannot find a general thread, I open a fresh one, since most of the threads seem dead to me. Radar gives you orbs to collect if you're not in Japan (you can do a treasure hunt there). With these orbs you can buy useful things like Dungeons or Monsters. For example you can buy +99 Attck Flamie, +99 HP Bubbie, +99 RCV Woodsie, SDR Latent Tama, any other Latent, Snow Globes, etc. It never gave me a stone.