>>44746620weather effects change dramatically. drought becomes tropical water. heals grass and rock types every turn. activates luminous moss and chlorophyll.
Drizzle activates cyclone. all pokemon will be randomly switched out and have a random chance to suffer confusion. This can be stopped with abilities and moves of course. This also triggers corsola to turn into galarian corsola.
Snow warning activates arctic water. stat changes stay regardless if the pokemon switches out or not. baton pass always fails and other status like toxic counter stay constant, not resetting after switch out.
Sand stream activates muddy water which makes it impossible to tell which pokemon has been sent out, how much health they have or the effectiveness of attacks.