Beach

Beach is the fourth area, right after Desert.

Overview
The first few columns are water, requiring Lily Pads. The next two are sand, which normal allies have issues on. Remaining columns are grass.

Gained Allies
Sand-pult (3-1)

Sugar Cane (3-2)

Water Blaster (3-3)

Fishing Rod (3-5)

Healer-shroom (3-6)

Furnace (3-7)

Wooden Trapdoor (3-8)

Incendiary Explosive (3-10)

Encountered Enemies
Dire Squid (3-1)

Baby Zombie (3-4)

Boat Zombie (3-8)

The rest are under debate.