The raid targets swap out every 10 days approximately ... Below, we list all the high-value raid targets (Legendary Pokémon and Ultra Beasts, Mega Pokémon, and shadow Legendary Pokémon ...
Besides Normal and Electric, every typing ... to have a single weakness, arguably making it the rarest of all such Pokémon.
Remember, Giovanni’s choice of legendary Shadow Pokémon and second party member rotate every few months. Also, as long as you have a Super Rocket Radar, you’ll be able to fight Giovanni.