Dewgong

Dewgong is overall a poor Pokemon due to its middling stats, which renders it unable to perform a given role effectively. A Water / Ice typing gives it many common weaknesses and its lack of recovery makes it unable to wall anything for extended periods of time. Additionally, Dewgong faces competition with Walrein and Lapras, as the former has Thick Fat and the latter has Perish Song. Dewgong's niche over those two Water / Ice type Pokemon is the fact that it has access to both. Being outclassed by Walrein by virtue of bulk and stalling capabilities, and having poor offensive stats overall, Dewgong struggles to find a spot on a good team.