there are TWO secret fruits in each map. one for each SIDE.
Ohhhhh....Mine isn't working
then try the OTHER.
I did
Step 1: Go to the enemy's last building.
Step 2: Climb the ladder to get to the second floor.
Step 3: Drop into the window(any one)
Step 4: Climb the Characters.
This should work for you, if it doesn't try asking ppl from Discord
