153 Friendship results in turn arounds. 

Eevee:
70-101		Catching the Eevee (it's the same bracket basically at such a low level)
102-127		Hitting Level 15 (usually... I've had mixed results, but lately I always hit this)
128-152		REALLY hard to say. I typically use Level 23 as my "cutoff". Would be good to get a better number
153-178		Level 28

Staryu:
77-101		On the Rare Candy to 44
102-127		After Surge, before Level 47 (probably the X Item on Blue)		->		With triple candy, you probably hit 102 after Lt. Surge. With quad candy, probably after Erika
128-152		After post-Sabrina Rare Candies, before Giovanni 3 level up
153-178		After Bruno, before using a move on Agatha