Noctowl

Noctowl is a decent specially defensive Pokemon, but there isn't much of a reason to choose it over Mandibuzz. It has poor physical bulk—leaving it prone to getting forced out by many physical attackers—a poor defensive typing, and unlike Mandibuzz, a movepool that lacks useful tools such as Taunt and Foul Play. Noctowl's only niche is Insomnia, which, together with its great special bulk, allows it to wall most Grass-types with ease, but more often than not, this isn't enough to justify using it over Mandibuzz.