Drake & Josh (2004)

S2E1 The Bet

Drake and Josh challenge each other to give up junk food and video games, respectively. Megan overhears their wager and insists that the loser must dye their hair pink. When their parents catch wind of their bet, they decide to join in on the fun with a wager of their own. As things spiral out of control, Drake and Josh find it increasingly difficult to stick to their commitments and ultimately choose to abandon their bet.