The violet family will not work at less than 100%. Ah, but there's a good thing: you can still raise bonding when they're adults!
So, what you do is set the time to 9:59 am, 11:59 am, 1:59 pm, 3:59 pm, and 5:59 pm and wait one minute after setting the clock to these times. Then your tama should call for bonding. Just to make myself clear:
For example, I set the clock to 9:59 am. I wait one minute and then they call for bonding. I do the bonding, yeah yeah yeah. Then, I go back to the clock and set the time to 11:59 am and do the whole process again. Make sure to use the first bonding items, not the second and third ones.
(don't worry about being in the "help for new tamagotchi owners" forum, experienced tama owners start topics here all the time.)