Well does Squirts have enough energy to use Hydro Pump on two consecutive actions (not counting STAB)? If so, then the combo works and she faints from exhaustion. If not, then the combo fails and she faints from exhaustion.
EDIT: Upon checking, it appears Squirts would have enough energy to use Hydro Pump on two consecutive actions (not counting STAB), so the combo would work and she would faint.