Unavoidable lemons:

Coconut Beach 1 : 2 lemons Coconut Beach 3: 2 lemons Jump'In Jungle 3: 1 lemon Mystic Ruins 2: 2 lemons Bone-Dry Desert 2: 8 lemons Snow-Cap Mountain 1: 1 lemon Snow-Cap Mountain 2: 5 lemons Snow-Cap Mountain 3: 1 lemon Blackthorn Island 2: 1 lemon Blackthorn Island 3: 1 lemon

Total: 24 lemons