Ronnie is a dark lavender and light gray shark who wears a black leather jacket with a yellow shirt inside it. He has long thick hair with some shiny purple showing on it.
When Sharkface intoduces the sharks, Ronnie takes a hairbrush and brushes his hair. The Sharks get SpongeBob to join their group and take a ride in their car. While on the road; they pass some girls screaming and tying themselves with a jump rope, a fruit vendor throwing a heap of fruit in their car and yelling, and finding out their favorite club won't let them in. When SpongeBob starts to have concerns about the Sharks, they egg him on and question why he doesn't trust them, with Ronnie calling him a "maybe baby". When SpongeBob meets the Sharks at the playground, it is known that the Sharks are not actually fighters. After finding out this was a dance showdown, not a fighting showdown, SpongeBob is much calmer and determined to win the showdown with the Sharks. In the end; the Sharks, the Pods, and the police all win and jump in the air.