Have Michelle hand feed Olimar, at least one of his meals each day. At first, she shouldn't ask him to really do anything but should feed each kibble by hand with the only criteria being that he is not mouthing her or jumping up on her. After a couple of feedings, she can start to use mealtimes as an opportunity to ask Olimar for a sit, down, or even just calling his name and giving a kibble when he turns toward her or rewarding him for holding himself still while watching her.
Doing this should help raise Michelle's value to Olimar and she should find that he pays more attention to her.