Updated so that Grintale drops the correct items and double checked that every other Alpha Pal drops intended items. Should be all good now! You could just download the AlphaPal version below and change that as that's the only file that got updated.

Grintale accidentally dropped legendary Tundra instead of Tropical. Fixed now. Also went over all the other Alpha Pals to make sure they do indeed drop what's intended.

This is the file changing Treasure chests in and out of dungeons as a standalone file. The main download contains both files in the .zip file, so this is only for specific cases.

After getting permission from the True Monster Rancher author, I've made a separate file to be used INSTEAD of GearProgressionTreasureBoxDrops_P. Only use one or the other between this and that. This version ONLY adds Vixy rates, not the rest of TMR.