Island 4

This is the fourth island you will fight. Most monsters here are Water monsters, so Thunder monsters should be used.

General Strategy
Koopigg is a Thunder and Water monster, which means the water monsters can't do much to him but he can strike back. Shanky is a Thunder monster with high power and life steal, so he can be a good choice too.

Levels

 * Level 31 - Two Turtles and a Sealion
 * Level 32 - The same thing as before, but there is a Musu that replaces the Sealion. The Musu ironically has lower health
 * Level 33 - The first wave is a whole team of Vapwhirls. The second wave is a Musu backed up by a Sealion
 * Level 34 - Many Shelukes
 * Level 35 - The miniboss is a boosted Gastosquish
 * Level 36 - Two Shock Turtles
 * Level 37 - The first wave is a Musu backed up by a Shock Turtle and a Sheluke. The second wave is a Vapwhirl and a Sealion
 * Level 38 - Three Koopiggs
 * Level 39 - A Sheluke and two Gastosquishes
 * Level 40 - The first wave is a trio of Turtles. The second wave is the same thing but a Dolphchamp replaces one Turtle and the Turtles get boosted. The final wave is a Lord of Atlantis who serves as the boss.