Rồngvern (ルングブルン, Runguburun) is Sagnik's starter pokémon from the Lichtstrom region. It is a fire/dragon pokémon that evolves from Rhaegal; a fire/flying pokémon. Rồngvern was given to Sagnik as a Vishapern during the start of his journey and over time has become his one of the strongest; if not the strongest, pokémon in his possession and is also apparently his best friend. Rồngvern is also Sagnik's only Pokémon that can currently mega-evolve.