Bulma:
どうせ
こうなるんなら
水着もってくりゃよかった!
If I knew we were gonna come here, I would have brought my swimsuit
どうせ In any case
こうなる Turn around here
ん Nominalizer
なら if
水着 Swimsuit
もって Hold
くりゃ Short for きたら?
よかった Good
I couldn't find the くりや ending anywhere. That's my best guess, but I'd like to confirm.