Why would Bowser build a castle on this tiny, uninhabited island

because he felt like it

>>388911757
well since its attacked by mario i guess it was a good move on his part

>>388911757
Mini Game Island is an underrated comfy location

>>388911867
Mario (or whichever character you pick) doesn't really attack it, though. He just goes, plays a bunch of mini-games in it, then leaves through the back-door

since no one knows where it is, it can't be ambushed

File: tumblr_obwl5mB08R1rrftcdo9_400.png (256KB, 218x482px) Image search: [Google]

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>>388911757
You know the rich and powerful, always building temples on small, remote islands to take all their secret, shady practices. Wario and Mario probably have secret orgy islands too.

>>388911757
Because he knew Pedal Power would stop me from 100%.

File: The Mushroom Kingdom 1985 - 1996.jpg (2MB, 1800x1200px) Image search: [Google]

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His goal is owning land and conquering the kingdom, it's no surprise he'd target anything he could get his hands on

File: 1408554571848.jpg (106KB, 640x360px) Image search: [Google]

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>>388913453
>all of mushroom world is inside the mushroom kingdom

>>388914364
Peach conquered alot of places, anon.

>>388914364
This always mildly annoys me.
>all the NES, GB, and SNES games are in the Mushroom Kingdom!
No only one is. Two if you count Lost Levels.