What determines the number of dolphins chasing the unicorn

achievementsiosrobot-unicorn-attack

The "Dolphin Dancer" achievement requires that I get three dolphins to appear on screen. It seems that the longer I run, the more likely I am to get more dolphins, but I'm curious what actually causes this number to increase. Is it distance, number of fairies collected, number of stars destroyed by rainbow power, or perhaps some combination thereof?

Best Answer

Based from my experiences playing the game:

The # of dolphins on screen = Current Score/5000 It seems the dolphins reappear after every 5000-multiple as well.

By this formula it would take 15000 score to get 3 dolphins. Hope this helps