Tarkus (タルカス, Tarukasu) appears in Diamond Records as a playable character in both the Action Battle and Tactical Battle game modes. He has a few unlockable statues varying between the 'Fighting Spirit' and 'Solitary' types, ranging from 4 stars to 6 stars.
Tarkus's moveset in both game modes is comprised of various attacks inspired by the anime using his sword, chains, and brute strength. Despite being a zombie in the series, the game gives him the "vampire" tag, and he has the qualities of a vampire character. Playing as him will force any outdoor stages into their night time variants.
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Moveset
Tarkus's basic attack string is a combination of up to five various strikes with his sword and fists. In Tactical Battle, this is cut down to only three hits.
Tarkus swings a chain around above his head and then attacks opponents with it. In Tactical Battle, this hits all opponents present on the stage. (Unlockable)
Tarkus performs a body slam that hits nearby opponents. In Tactical Battle, this hits all opponents present on the stage.
Tarkus lets out a long barrage of punches while continuously walking forward. In Action Battle, you have control over Tarkus's movement as he is performing this skill. (Unlockable)