I just watched the TV special for it again and it was like the lightest and brightest thing I've seen in a while
What happens in the game?
The Pokemon series
is the lightest and brightest thing you'll see in a while, you aren't mistaken. But Pokemon Mystery Dungeon just focuses more on a deeper plot than the quest to catch them all.
Now it's actually a series of Pokemon Mystery Dungeon games, but Rescue Team is the only I've played of the four.
The game starts telling you that "this is the portal to the world of Pokemon!" and... a personality quiz. This personality quiz determines what Pokemon you will be, and then you choose a partner Pokemon (and you can set names too!)
All that makes sense right afterward, as you find yourself sleeping in the plains, awakened by the partner you chose. You claim to be a human but you are indeed a Pokemon in every aspect depending on the results of your quiz. And then you tell your name and the partner finds your name funny
by mere coincidence.
Then you hear a cry for help from a Butterfree and its Caterpie fell into a cavern through a fissure, and it can't get it back because the Pokemon in that hole are hostile.
So you enter the first dungeon, the Tiny Woods, and this is where the gameplay starts. You go there, climb down some stairs scattered around the dungeon while killing- sorry, knocking out other Pokemon that don't like your face, get the Caterpie and back out. Or die because enemies actually deal a fair amount of damage in the beginning and humiliate yourself.
Once you exit with the Caterpie, Butterfree is glad and some glad dialogue occurs and you get three consumable 'berry' items for varying purposes. You have nowhere to stay so the partner suggests you follow him to a base, that is actually different for each Pokemon you are.
There have been many natural disasters like that fissure lately, so the partner gets the idea of making a rescue team with you to save such victims of disasters. So you do.
After doing a few rescue missions, the plot then thickens as you go on. I'd be spoiling if I were to say more, pretty much. I wish I had not written so much, but I feel these details just can't be missed.