Level 84

This is the fourth stage you will fight on this island. It features three Water monsters and a Musu to deal with the team's weakness; Thunder.

Strategy
Musu is there to protect his teammates by dealing heavy damage to any Thunder attacker and healing. Kill him first. You can use a Dark attacker or Jakugan's Head Crop to kill the Musu. MC Boss is also a good choice since he takes less damage from Earth moves and can deal heavy damage to Water monsters. The Sheluke and Octocrush should be easy with any attacker honestly.