I tested the JP codes.
Inf. Stamina: does not work; Stamina still decreases, but if you try to use tools, they didnt work (like axe doesnt cut woods, hammer doesnt smash stones).
Inf. Item Use: seems to work only for water can, but other tools and items.
Time codes: working fine.
May I ask for codes for earnings multiplier, infinite & 5-star item in backpack, infinite quantities of tools.
crazy_p's working on them he's way ahead of me, so I stopped working on them, he'll post his in a bit