It's also a random drop from medium bipeds

also drop from desert arena

También lo vende emil si lo paras entre el edificio después del prólogo y el camino a la fabrica en la ruta B o posteriores.\It also sells emil if you stop it between the building after the prologue and the road to the factory on route B or later.

Can be bought from emil's Item Shop - Desert Entrance Route

Also sold at the underground colosseum in the forest kingdom