Hello recalificator,

OSM is used by many organisations for many purposes, it is not a toy. By making fake edits, you lower the quality of the map, meaning those who use it (including Niantic) are less likely to be able to update their data in the future.

Additionally, by the time Niantic does update their data, Wiglett will have most likely been featured in an event.

Rather than wasting everyone's time vandalising the map, I would suggest that instead you maybe take a trip out to this beach: https://www.openstreetmap.org/way/1065956524 which should trigger the beach biome you're looking for.