Winx Club

Grounded (aka Friends in Need) (1x7)

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The Winx girls and the Red Fountain guys have a cleaning party as a ""punishment"" for going to Cloud Tower, when the witches conjure up a minotaur to take them down. The Winx Club is useless without their powers, but defeat the minotaur anyhow. Impressed, Gricelda gives their powers back.