OK K.O.! Let's Be Heroes - Season 1 - Eps 13: Just Be a Pebble
K.O. is tired of being small, so Rad gives him a candy bar that can increase his size. However, K.O. soon realizes that being big isn't all it's cracked up to be, when he accidentally hurls Mr. Gar's car keys in the sewer while trying to help him (due to his increased size), and must shrink to be able to retrieve them.
About OK K.O.! Let's Be Heroes

Title: OK K.O.! Let's Be Heroes
First Air Date: 2017-08-01
Last Air Date: 2019-09-06
Status: Ended
Rating: 7.8/10 (from 74 votes)
Language: EN
Seasons: 3
Total Episodes: 108
Network: Cartoon Network
Genres: Animation, Comedy
Production Companies: Cartoon Network Studios
Synopsis
Animated comedy set in the futuristic year of 201X, where the world is populated by video game and manga-esque characters.
Cast

David Herman
Brandon

Ian Jones-Quartey
Rad

Courtenay Taylor
KO

Kate Flannery
Carol

Ashly Burch
Enid