Castillo (シェロ・カスティロ Shero Kasutiro?) is DenTech City's first theme park, which has its grand opening during the events of Mega Man Battle Network 4. It serves the purpose for many events, including the NetBattle tournament known as The Eagle/Hawk Tournament. Attractions include Solar Boy Django, Halberd Princess, WzDog, and TinMan. ShadeMan.EXE causes chaos in the area, but he is deleted by MegaMan.EXE.