In “Enemy Drops” Treasure Chest icon, the drop rate should be 100%. If you get to the Cat Shrine in PGAD, when you toss 100 Git into the Offering Box, you receive one guaranteed Cat Ema.
The same error is in the linking page, at the bottom, the Cat Shrine drop rate should be 100 %. https://anothereden.wiki/w/Present_Garulea_Continent_(Another_Dungeon)/Treasure