Robot Trains (2015)

S1E18 Hang in There, Kay!

Kay and his crew face off against Duke in an intense showdown. Despite Alf managing to restrain Duke, Duck unleashes a barrage of water from his water guns, and Selly deploys G-force Nanobombs to aid in the fight. Unfortunately, their combined efforts prove futile against the formidable foe. However, fueled by determination, Kay and his friends persist. In retaliation, Duke revs up his engine, channeling energy from the Fountain Plaza and plunging the area into darkness.