The pokeradar is made specially for that. If you start a hunt with
it, it increase your chance of the Pokemon hatching shiny with
every egg, until you reach the maximum chance after 40 eggs. Then
you can further increase shiny chance with Premium account. Also,
with premium you will not lose your increased shiny chance after
hatching a shiny. But for the pokeradar to work, you are only
allowed to hatch eggs of the pokemon you want to hunt, or your
chain will break
In case of emergency Plushie