If the pentagon is gold, you have standard "Extra" gear. If it's missing, you are still in Rare territory.
This post explains what "Extra Quality" (追加クオリティ / エクストラクオリティ) tied to save data in Danball Senki W (Little Battlers eXperience W) is, how it works, and practical ways to obtain and use it. Assumes you want to maximize customization and parts quality across playthroughs or transfers between different copies. danball senki w save data extra quality