I came across Erins Animals on You Tube for the best way to train a robo. She handled this litter since they were 2 weeks old so they aren't afraid of her as she shares this in the video.
Pet shop robos may take weeks or months to become tame, if at all
As she says chasing a robo, trying to catch it is not the correct way to tame then. She says to pick them up when safety is an issue only. There seems to be some confusion about this topic.