That's the first time I have ever heard of that anime. Is that a pedobear?
Meh, I think the writers even realize that a team of Pikachu / Charizard / IKUZEfrog / Sceptile / Blazefernape / Snorlax would destroy every non-FB/E4 team on the planet.
On the second point, yes. Unless they treat each of them like Swellow or Heracross and force them to lose to create a sense of drama there is pretty much no way they lose one on one, heck Charizard only became a fall guy for using a fighting move on a ghost.
It breaks suspension of disbelief.
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On the first part.
And yes, Kuma Miko is a SoL series with a sprinkle of dark humour. It followed the lifes of the people in a town where a young Miko was taking care of a shrine with a talking bear.
It was both sarcastic, cute and funny for the most part of its run. This is when the Anime writers started to take some liberties and it went to **** in the final where they destroyed the premise and took a hit by exploiting the social disorders of a little girl for comedy, something the original author didn't do, but took the blame for not supervising the Anime writers.
The Anime Writer and director for that episode HAD to take that episode from their resume to save face and the writer took a hit from all the bad reputation from this mess.
This is quite similar to the Pokémon situation in wich false advertising and contrived writing took away the "win" from a character and turned it into a lose that went against the spirit of the source material.
Honestly kuma Miko was praised similarly to XY in a way that they had great art direction, choreography for a SoL and it's punchlines as well as photography, for the environment and character focused scenes, along a great soundtrack to chill while watching, but was betrayed by Anime only writing...of the worst kind and false advertising of the arc as even when she won things went to the shitter.