In Pokemon Sword and Shield, The Dynamax band is a Key Item introduced. It was invented by Oleana and allows a Trainer’s Pokemon to Dynamax in Power Spots and perform Max Moves. This is the pattern I came up with for the Dynamax Band.

MATERIALS:
Worsted Weight Yarn: White, blue, shocking pink, and black.
B crochet hook
Polyester fiberfill
Yarn Needle
Elastic cord