Cyndaquil

On paper, Cyndaquil's access to Eruption should make it a formidable sweeper; in practice, Cyndaquil's mediocre Special Attack and movepool leave it checked fairly easily. In addition, due to Cyndaquil's average Speed for an offensive Pokemon, it is forced to use a Choice Scarf set to be effective. Eruption allows Cyndaquil to make up for its relatively low Special Attack, but Cyndaquil's weakness to Stealth Rock and low bulk make it hard to keep Eruption's power up, and Eruption is Cyndaquil's only way to deal meaningful damage. Generally speaking, Ponyta and Larvesta are better options for offensive Fire-types, and even Houndour is a better choice as a Fire-type special attacker due to having much better Special Attack and a more useful movepool.