So I found the way to get achievements of fishes and bugs or even all. (Just fish and bugs here)
YOU SHOULD HAVE MULTIPLE BACKUP!
Things you need:
1. JKSV or anything that could Export your saves.
2. NHSE
3. Cheat Engine 7.0
Steps:
1. Export your saves from switch to PC.
2. Use
NHSE, click "
Tools" - "
Dump Decrypted", create a new folder and dump it there.
3. Download the
Nook Ach.CT
4. Open
Cheat Engine, click "
File" - "
Load" - Select
Nook Ach.CT
5. In
Cheat Engine, click "
File" - "
Open File" - "
The Folder you dumped in" - "
Villager0" - "
Personal.dat"
6. "
Open binary file" window would pop up, stay on
32-bit and click
OK.
7. "
Keep the current address list/code list?" would pop up, click
Yes.
8. Mark the box next to "
Hex", and "
00000000" will show on the right.
9. Now you can start changing your achievements memory, copy the
value you want, paste it under the "
Value" box, go for the
First Scan.
10. Use
https://www.rapidtables.com/convert/number/decimal-to-hex.html and
https://www.polygon.com/animal-cros...e-rewards-titles-list-tasks-miles-chart-table to see and put in what number you need to obtain the achievement.
11. After you finish all your numbers, click "
File" - "
Save File" - click on "
Personal.dat" and click ok.
12. Back to
NHSE, now "
Tools" - "
Load Decrypted" and save.
13. Import the save back, and you are all set!
I'm not a professional coder or something alike, there must be a smarter way but I just don't know.