Tera Type is a new mechanic introduced in Pokmon Scarlet and Violet that allows trainers to change the type of their Pokmon. This can be a useful way to give your Pokmon an advantage in battle, or to simply change their appearance.
To change a Pokmon’s Tera Type, you will need to use a Tera Shard. Tera Shards can be found by defeating Tera Raid Battles, or by purchasing them from the Delibird Presents shops in Mesagoza and Levincia.