Pika and Kamaya are brothers living on Mystery Island. Kamaya has a job delivering packages, and one day Pika joined him on his deliveries. Pika kept falling over, and eventually tripped on a vine that sent them both falling into a pit. Pika managed to get out by balancing on Kamaya's head, and then lowered down some vines for his brother. In return for rescuing him, Kamaya agreed to play games on the beach after he finished his deliveries.
From the picture with the story, it appears that Pika is a baby Kougra. He appeared in issue #15.