This is the shiny Scyther he caught a few years ago :> http://mariosdayjob.butterscotchcomics.com/untitled-comic/317-the-winner/

When I was brainstorming this, I kinda, sorta totally forgot that HMs aren’t a thing in Alola. But it seemed in character for Guzma, or at least the MDJ version of him, so I went with it.