Babies gone wild!
That is because the wild area has been invaded by babies! This is all part of the new Easter event that is happening in the Wild Area for Sword & Shield.
Until April 15th, you can find several Baby Pokemon and Ditto in Max Raids. The following Baby Pokemon can be found in Wild Area Max raids: Pichu, Togepi, Riolu, Munchlax, Budew, Tyrogue, Bonsey, Mime Jr., Wynaut, Toxel, Mantyke and Cleffa.
There will also be a boost of Candy and EV boosting items.
Best of luck in catching these babies!
Source: Pokemon Japan Twitter