They appeared in episode 9 of the original anime series and are the main antagonists of that episode. Spyke (who is distraught over his loses as a Medafighter and getting fired from The Screws) decides that the only way to win was to defeat those that were weaker than him. His first targets were the Ankle Biters, who he thought were simple preschool kids. Despite Ikki Tenryou and Erika Amazake telling him to leave them alone, he challenges them anyway revealing their devious nature and their Medabot, Churlybear, for the first time. Not only does Spyke and Cyandog quickly lose, but the Ankle Biters declare themselves the best gang in town.