For anyone who was beaten Matt in wii sports resort swordplay, this is how you use a purple sword, all you have to do is to hold 1 while you select “ok”
Wii Sports Resort Swordplay Duel: Sully VS. Champion Matt + Purple Sword! - YouTube
Boss | Wii Sports Wiki | Fandom
I made the Wii Sports Resort sword fighting arena in Minecraft : r/Minecraft