10 Hidden Video Game Bosses You Weren't Supposed To See
3. Tiny Forest - Mother 3
Granted, you could argue that Nintendo doesn't really want you to see Mother 3 at all given that the legendary RPG still doesn't have an official release outside of Japan - despite releasing there way back in 2006.
But even so, hackers discovered an unused enemy in the game's code by the name of Tiny Forest, which has a complete AI combat routine and so can be fought like any regular enemy.
Tiny Forest was originally supposed to appear in the Mole Cricket Hole area of the game, and due to the extent of its attacks and the amount of HP it has, it was very clearly supposed to be a mini-boss in the least.
Despite appearing to be a basically complete enemy, though, the Tiny Forest curiously lacks an overworld sprite, and so resembles a placeholder enemy until you engage with it.
As for why the mini-boss was removed? Your guess is as good as ours.