You need:
-Cheat Engine
-Flash 10
-Flock browser/firefox

Instructions:
1) Open Cheat engine
2) Play Pet Society
3) Exit your house and click on a tree to get a coin.
4) Scan “8B78088B8FFC0200008945D8C745DC” (Hex, Array of bytes, ASROM)
5) 1 address returned. Right click > Disassemble
6) Scroll UP a few lines and you should see this “ jne xxxxxxxx“
7) Right click and select “Replace with code that does nothing”
New scan “8B402485F60F849B020000” (hex, array of bytes, ASROM)
9) 1 address returned. Right click > Disassemble
10) You will see the code ‘mov eax,[eax,+24]‘
11) Change it to ‘mov eax,90‘
12) A few lines down, you will see the code “mov [ebp-24],00000001”
13) Change it to ‘mov [ebp-24],000001f4‘
14) Now, click on a tree. Wait for around 4k-5k coins and click ‘Add Coins’
Then exit shop
15) Repeat step 14 and 15 till satisfied.
¡Enjoy!
Credits to: pwnthis.net