How can you go inside the miletos castle in zoids legacy?

In Zoids Legacy, to enter Miletos Castle, you need to progress through the storyline until you unlock access to the castle. Typically, this involves completing certain missions and defeating specific enemies leading up to the castle. Once you reach the castle's vicinity, you should be able to enter and explore its interior. Make sure to check for any key items or conditions that may be required to gain entry.