As a Pokémon expert, I can tell you that Cofagrigus is a Pokémon species that is known for its Ghost type. It is the evolved form of Yamask, which is a single-stage Pokémon. Cofagrigus does not have any further evolutions beyond its current form. It was first introduced in Generation V of the Pokémon games.

Here's the evolution line in English:
Yamask → Cofagrigus

And now, the translation in Chinese:
作为宝可梦领域的专家，我可以告诉你，Cofagrigus 是一种以幽灵属性著称的宝可梦。它是 Yamask 的进化形态，Yamask 是一个单阶段的宝可梦。Cofagrigus 在其当前形态之外没有进一步的进化。它最初在宝可梦游戏的第五世代中被引入。

这是进化线路的中文翻译：
Yamask → Cofagrigus

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Cofagrigus (Japanese: �ǥ����`�� Desukarn) is a Ghost-type Pok��mon introduced in Generation V. It evolves from Yamask starting at level 34.read more >>