Voltron: Legendary Defender - Season 1 Episode 2 -

When the Paladins are unable to form Voltron during a training session, Coran puts them through his own rigorous training in order to build a sense of brotherhood and trust between the Paladins. However, the Paladins fail miserably and are unable to connect. It is not until the Paladins engage in a food fight with Allura and Coran that they finally begin to work as a team and are successfully able to form Voltron.