Robot Trains - Season 1 - Eps 25: The Time Tunnel
Kay loses control of his engine and starts to run too fast, causing space-time to warp and twist. Kay visits the Fountain Plaza and notices that everyone is moving very slowly. Duke is the only one who realized what's happening to Kay and comes to help. When Duke tells Kay that no one can see or hear him because he's moving too fast, the Time Tunnel opens up.
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?