2 - I think: key items are uncountable. everything else is countable. an item can be held iff it is countable.
4 - check bp for ultimate held item ref or something
5 - I need a better way to represent NPC interactions in different games
6 - how much does growth mulch accelerate soil drying? how much does damp mulch slow it?
7 - does lum berry cure confusion?
10 - 4 shoal salt + 4 shoal shells, traded to a guy in Shoal Cave, make a Shell Bell
11 - white flute increased encounter rate by 50%, not 100%
12 - shards can be traded for the respective stones