Description
"it was previously unheard of that a Fused pokemon could undergo Dynamax, and it's still thought to be unhealthy, the Radiation throughout its body reacts poorly to the G-Max waves, creating a highly unstable creature..."
in this form, Dredness gains access to the signature move: G-MAX SHADOWSURGE, which makes dark tendrils across the field, damaging and Sleeping pokemon on entry.