>>16505146Ninja frog has a very slight advantage in his special defense over physical defense, so the idea behind hasty is to ease his switch-ins to special attacks. Either works though and that decision should be made based on the composition of your team.
U-turn on a 122 base speed is good for clipping sashes, doing good damage in some matchups and for keeping your momentum. Run it if you aren't also using him for spikes support IMO.