>>15838337
>Whatever happened to his castle in 2 anyways?
Unlike a lot of greedy characters in media Wario doesn't really care about saving his money or using it wisely. It's canon he sells a lot of his treasure just to buy food and WarioWare Gold shows by making it so that his plan to make "quick cash" to just buy pizza is to organize this huge fighting tournament that leaves him with bathtubs full of money, only for him to waste most of it on balloons.
Wario is a one-man economy.
He could just have as easily lost his castle between one game to another in a hasty bet or sold it to buy acres full of garlic.
Alternatively, he might still have it, he's just not living in it.