half of these issues sound like you might be using an old save, its always broken and i say in a bunch of places not to, and a good chunk of the other half were fixed in more recent patches so i dont think youre on .7.0.4.
it also sounds like you didnt talk to the shopkeep after getting the digivice which does tell you to go see him for the upgrades
Viewing post in Renamon VS Creatures V0.07.0 Jungly-weapon update comments
*Save data completely deleted, New Game Started*
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Passives are now active from levelling up
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Slime Rena fight:
During 'Rematch', character model disappears when returning to fight again, after selecting 'give in' to view full scene
After the 'rematch' fight, the sprites are in the wrong locations for the cutscene
Slime Boss fight:
While being slimed and having Slime Regen on changes the sizes of the icons, becomes very small
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'Flesh Camp'
Both 'Stars" still block the Flesh Area and Jungle Area, physically cannot pass with either arrows on keyboard or mouse click
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Rena Village
Tile beside Yellow Rena to right of door impassable
No Renas in the Bar can be spoken to aside from barkeep
'Pumpkin' Cutscene found and triggered correctly
"Eyes" blocking the paths at the statue puzzle are not solid, statue and player can pass through
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Digi Area:
Recommend making middle tile the return tile (Step on + Interact button) for easy exit
TV on left side is interactable and has dialog
'Crating Tables' are now interactable after seeing shopkeep
Gallery Room found and is interactable