Recreating entire continents is no biggie compared to Reddit user QueenMercury recreating every single one of the original 151 Pokemon. Every. Single. One.
While recreating Pokemon in Minecraft can easily be done with a script like SpriteCraft(given the pixelated nature of Pokemon sprites) QueenMercury created each of these images only using the Minecraft creator mode.
For anyone wondering, the hardest Pokemon to recreate this way according to QueenMercury was Articuno, Gyrados, or Butterfree while Ditto (of course) was the easiest.