This is a guide to get an event 6IV Marshadow, holding a gold bottle cap. 

You will need a 3ds, Pokemon Sun, Moon, Ultra Sun, or Ultra Moon, and an unwanted pokemon to trade for this.

*Or instead, they can also be sent directly from my pokemon bank to your pokemon home if you give me a transfer code. Pokemon sent to home will not be able to have any held items.

After purchasing be sure to send a message with your Friend code and In game name(your trainer name in pokemon so I know who to trade with, NOT your mii name). 

If you want them set to home, just let me know when you're available and I will tell you if I am ready to receive the code.

Disclaimer: All rights to Pokemon belong to Nintendo and Gamefreak.