--house gets a second bedroom --booze gets better --ten gallon tidal wave --row boat summoning --bamboo just gives him bamboo shoots to eat
From Mermaid
--house gets a bathroom --booze gets even better --able to damn people twice in a day --actually aware of his damn boat summoning now --marimo ball --oyster that once every few months gives him trash, not a pearl
From Midsummer
--house's bathroom gets nicer fixtures --some control over what booze he summons --boat is now a dinghy --fifteen gallon tidal wave --able to call on a sailor's ghost who is sometimes helpful
Notes
--house gets a second bedroom
--booze gets better
--ten gallon tidal wave
--row boat summoning
--bamboo just gives him bamboo shoots to eat
From Mermaid
--house gets a bathroom
--booze gets even better
--able to damn people twice in a day
--actually aware of his damn boat summoning now
--marimo ball
--oyster that once every few months gives him trash, not a pearl
From Midsummer
--house's bathroom gets nicer fixtures
--some control over what booze he summons
--boat is now a dinghy
--fifteen gallon tidal wave
--able to call on a sailor's ghost who is sometimes helpful