>>12110702On /vp/ its a claim made by folks who don't like the way some pokemon (mostly newer ones) look, but lack the fundamental understanding of art and communication abilities to provide a logical basis for their opinions. Thus, they latch on to a term they've heard others use and try to apply it as a justification for their dislike of a pokemon's appearance.
However, it should be noted that there are a few instances of pokemon who could use a bit more creativity in their designs, and some pokemon who could use a bit of simplification in their designs.