Daniel and Ryan part 6

All of a sudden, a baby yellow bird popped out of nowhere and started attacking the Dark Pig. The Dark Pig threw him off his back and into a tree trunk. The baby yellow bird had a bump on his head and continued fighting. The Dark Pig attempted to squash the baby yellow bird but missed him. He looked, and realized it was on his head! The baby yellow bird then pecked the Dark Pig down into the dirt. Daniel was stunned. The Dark Pig had just been defeated by a baby yellow bird! Or not. The Dark Pig shot out of the ground, knocking the baby yellow bird down. 
"Sorry to lose and run, but I've got other plans," the Dark Pig snickered, turning invisible and running away.
Who is this strange baby yellow bird? Find out in part 4!