My brother was curious to hear how ice type Pokémon work in this setting.
I haven't talked about them much so far because the answer might sound a bit boring: the "superpower" of ice types is simply surviving and thriving in cold environments. In reality that is definitely demanding enough, but yeah, it isn't nearly as flashy as bursting out flames or floating in the air. Their bodies aren't made out of ice or snow, they simply look the way they do in order to camouflage into their environment, and they don't really shoot ice out of their mouths either. Though a select few, like the tiny Snom, can spit out acid that in cold air feels like it's freezing your skin.
Ice type Pokémon can also be a rather depressing subject to talk about because of how badly they are affected by climate change. Their living environment is currently shrinking faster than most of the Pokémon can adapt to, which means that at least some of them are going to become extinct in the future. Some will likely survive in captivity and some might crossbreed with their non-icy relatives to let at least their genes survive on, even if their species itself disappears. Some, like for example Cryogonal, are however so higly specialized to cold that things are looking very grim for them.
He also wanted to know if there are "evil teams" like Team Rocket in Mundane and if yes, what are they like.
Pretty much all of the evil teams of the game series are based on real life in Mundane, but most of them don't have much to do with Pokémon. Team Yell are based on your average annoying football hooligans, Team Star and Team Skull are based on youth gangs that vary from rather benign to actually dangerous etc. They don't really use Pokémon more than their irl counterparts would use animals.
Then there's Teams Rocket, Plasma and the group of Magma, Aqua and Galactic. The latter three are based on fanatic religious groups that worship certain Pokémon. These Pokémon are usually legendaries and mythicals, meaning there's no scientific proof of them existing, but these groups do still believe in them. They don't usually cause harm for Pokémon, but they can for sure be detrimental for the people who get lured into their ranks.
What Team Plasma pretends to be like in the beginning of B/W games is based on extremist groups that think Pokémon should not be living together with humans, not for food production nor for companionship. They see their own actions as something that protects Pokémon, but in reality their means cause much harm for both people and the Pokémon they claim to help.
And lastly Team Rocket is based on wealthy, influential orginized crime groups like mafia. In some places these people are basically above the law and can therefore keep Pokémon that no normal person should ever have, usually for clout. These Pokémon are often aggressive, large and/or rare and they are rarely kept in appropriate ways, causing them sickness and suffering. Sometimes the Pokémon do also escape, which can end badly for both the Pokémon and humans unfortunate enough to come across them.