What's That Poke Ball?

The next Pokemon Go event has been announced. It is What's That Poke Ball, aka Pokemon Go's April Fools Day Event. The event is on Apr 1st, starting at 12:00 am/00:00 local time and ending at 11:59 pm/23:59 local time.

What to expect during the event

During the event, "poke balls" appear on the map, but they are not poke balls. They are Pokemon that can disguise theirselves as a poke ball. That includes Voltob, Electrode, Hisuian Voltorb, Hisuian Electrode, Foongus, and Galarian Stunfisk. All can be shiny except both forms of Electrode.