There are no universal toddlers. Do you mean universal teens? Well I have never had a universal character but from what I heard a universal teen can evolve into one of the family groups if you take really good care of it.
Also if you are wondering what toddlers evolve into what family groups, harutchi evolves mame, mizutamatch evolves into meme, puchitchi can be mame or meme, and mohitamatchi can be kuchi or meme. All can evolve to universal.
I hope I have answered your question.