Maelstrom

Strategy
The table below will show each combination of bird team that can defeat Poseidon Pig. By ThunderSlasher123:

Use Druid, Pirate and Rogues. Attack with all birds, then heal when you lose health. Use the Rage Chilli on Rogues If your birds are doing okay overall on health, or Druid if you need emergency Healing. With this Strategy, you will at least get 1 Star. Get to at least Cave 5 to do the level again to get 2 Stars, and get to at least Cave 10 to get 3 Stars.

Trivia

 * If Poseidon Pig takes damage as it attacks and the damage is what finishes it off, an animation error will play: Instead of just becoming flat and then a puff of smoke, Poseidon Pig will also do its respawning animation.