Bulma was playing some basketball as it was a hot day. Bulma had hot pink and purple Fila BB84 hightops on with purple socks. Violet Taisa came to the basketball court wearing Nike Dunks sneakers with green socks. "It's hot, i need a drink" said Bulma as Violet gave Bulma a drink, the moment Bulma drunk the drink, she began to grow, Bulma's clothes (Especially Bulma's Fila sneakers and socks) grew along with her. Violet took a sip of the drink and the same thing happened as Violet's sneakers and socks grew along with her."We are in a big city that's next to a desert!" said Bulma! Bulma challenged Violet to a game of Bulma's choice. "Under one stipulation! You choose the sport, I choose the stipulation" said Violet

What is the stipulation?