Star Reef Castle

Before retrieve the third egg
Wizpig is here and he upgrades himself up!

After retrieve the third egg
Wizpig has been defeated and the birds are very happy and one of The Blues pokes him with a stick to find out if he is alive. But he is still alive and run away. Not just angry with the egg, he was also alarmed that the Blue Key (which can be used to unlock all of the Blue Pig Gates, which have blocked Bamboo Forest, Eastern Cobalt Plateaus and Banjo Bayou) has been fallen out of his protection and landed on the birds! The birds were cheering because they have retrieved the third egg! Wizpig was angry, so we cut to a shot of the Chronicle Cave's five lights, and for retrieving the third egg, the third light turned on. Not only that, because Wizpig  has dropped the Blue Key (which can open all Blue Pig Gates) so the birds found it! Wizpig was even more angry, yet upset! He is not giving up, though - he is going far, far away to another castle, and the fourth egg pops on Mountain Pig Castle, which he definitely thinks he's better at and the Birds are worse at.

Difficulty
5.Considerably hard

First strategy
Warning: Be careful! If you do not use the Banana Juice/Sea Berry Juice to the bird who is almost out of health, the pigs may attack the bird who is almost out of health and will knock you right out of the game! Choose Red in Samurai, Matilda in Druid, and The Blues in Tricksters. In the first wave, you'll attack every turn with the birds (Rogues first, then Stick Pig, then Pyro Pig). Use Matilda's secondary skill to heal the birds if they are not at full health. If the Pyro Pig is almost ready to attack, defend the birds with Red's secondary skill. If a bird is closer to being out of health, it would be more recommended that you use Sea Berry Juice so you can heal the bird that is almost out of the game. (Hint: Do not use the Rage Chili in the first wave.) Then, in the second wave, immediately give the Rage Chili to Red, and then, attack every turn with the other Birds. If the Lightning Pig is almost ready to attack, defend the birds, and use Matilda's secondary skill to heal the birds as well (along the way if either bird is almost out of health). In other cases, use The Blues' secondary skill along the way to dispell harmful effects such as stun. Then, in the third wave, use Matilda's secondary skill again to heal the birds again at all times, and then attack every turn with the other birds, otherwise, if the Rage Chili is full, give it to Red. If the Nature Pig is almost ready to attack, defend the birds at all times, then dispell with the Blues' secondary skill. Remember to remove his revitalization effect with The Blues. When you enter the fourth wave, give the Rage Chili to The Blues, and then, attack with the other birds. Along the way, use Matilda's secondary skill so you can heal all of the birds. Then, in wave five, meet the evil genius himself - The Wizpig! Again, you can attack at every turn, but if your birds' health are not full, use Matilda's secondary skill first, then attack at every turn. Then, give the Rage Chili to The Blues so you can dispel, stun, and attack the Wizpig at the same time. Then, when the Wizpig is back in the game, use Matilda's secondary skill again to heal the birds, and then attack every turn. Ensure that your birds' health is full before Wizpig is ready to attack again. If Wizpig is almost ready, you must defend the birds or use Matilda's secondary skill to heal the birds, and remove his damage boost, otherwise, he will get you out of the game. Repeat this over until you win or lose.

Second strategy
Choose Matilda in Druid, Bomb in Cannoneer and The Blues in Rogues. Attack every turn in the first wave (except Matilda, if the birds' health is full, attack with her, otherwise, heal with her). Every attack at the first wave focus on Pyropig, then the Stick Pig and at last, the Rogues. Also, don't use the Rage Chili on anyone in this wave. At wave 2, use the Rage Chili immediately on Bomb to explode(once only). Then, try to defeat the Lightning Pig and then, all the Mummies(just like how to defeat the pigs at the first wave). At the third wave, use the Rage Chili on Matilda if it's full(twice only), if not, continue attacking the Pigmy Shooters first, then the Forest Pigmies then the Nature Pig(still attack just like wave 1 and wave 2). At the fourth wave, use the Rage Chili immediately to The Blues. Then, attack the Necromancer until he dies, kill the Banshee and then knock out the Stinky Zombie(just like the previous waves). Meanwhile, when the Rage Chili is full, use it immediately on Bomb. Then at the last wave, attack just like the previous waves to Wizpig(except when Wizpig is about to attack, use Bomb's secondary skill on himself and The Blues' secondary skill on any bird. Anytime when the Rage Chili is full, wait until Wizpig uses his secondary skill (Power Up Shroom) then use it for The Blues. Repeat these over until you win the entire battle or lose the entire battle.