Well, the "main" puzzle is finding this special Sword, Armor, Shield, and Helmet that, when put on statues, opens a door.
There are lots of puzzles that you have to solve to finish the main puzzle. Like altering the flow of water to meet your needs, putting certain colored flames on certain braziers putting blocks with certain monster designs on them in certain places, and a few other puzzles.
Hellz yeah I'm excited. I hadn't been playing much Pokemon lately though... About to start again on Leaf Green, HG, Emerald (If I can find a replacement, bro lost mine) and Pearl. Go through them all... You excited?
By the time your kid's old enough for Pokemon there's gonne be like 7th gen, that's awesome.