Here's a pepperoni secret: rn on EN MySekai you can check if a rare material has spawned from the material screen

If you tap on a mat and then an area, if said mat is in that area, the pop-up won't have the red "not available in this weather" text

For a practical use example, you need a diamond for your gate. You longpress to bring up the areas. You tap Wisher's Cove, and it doesn't have the red text. Therefore, there's a diamond in a barrel or in one of the rocks (even if it's not doing the flashy colour thing)

This got patched out a month or two into JP MySekai, but I haven't seen anyone EN talk about it... but tbf I saw it off a JP tweet just before it got patched out, and it had like, 30 rts lol