I think Event held items should either, at the least (effort), maybe have their own section, or else be integrated into the event distributions section. So I'm going to omit those below, but it's not really too hard to
There are certain advantages to something like this that I kinda like (copying produces more intuitive results, and similarly you could lay them out intuitively "RB / Y / MysteryBerry" instead of "RB / MysteryBerry / Y"). But it's also generally more complicated, so let's not reinvent the wheel today. (Obviously there are also some unsolved problems below. PLA (and FRLG) demonstrates that the cells don't automatically fill the "row" height. The DP+ and ORAS+ groups most clearly show how the items are top-aligned.)