From The Pokemon Insurgence Wiki
Dragonify is a non-damaging Dragon move exclusive to Pokémon Insurgence. It is TM117.
Dragonify changes the target's type to pure Dragon; the effect lasts as long as the target is in battle, and changing form or transforming will also remove the effect.
Dragonify does not affect Pokémon with the Ability Multitype. Dragonify fails if used on a substitute.