Robot Trains - Season 1 - Eps 16: The Festival Day
Kay and Alf tie with eleven cargos each, which they have received from helping other trains. With Kay's Base as the last section of the race, Kay and Alf fight for each other's cargos but end up giving all their cargos to Duck who was strolling at the bottom of the hill when the law of inertia works in Duck's favor.
About Robot Trains

Title: Robot Trains
First Air Date: 2015-02-26
Last Air Date: 2019-05-19
Status: Ended
Rating: 5.7/10 (from 3 votes)
Language: KO
Seasons: 2
Total Episodes: 84
Network: Unknown
Genres: Animation, Kids, Action & Adventure, Comedy, Sci-Fi & Fantasy, Family
Production Companies: CJ ENM, Union Investment Partners, Woori Investment Co.
Synopsis
Set in the "Train World" where all citizens are trains. However, among the residents there are special trains that can transform into robots, the Robot Trains! Featuring our 5 train heroes, with special powers: Kay, Alf, Duck, Selly and Victor - and their exciting adventures. Can the Robot Trains save the village from the evil dark forces that be?