3. Sudowoodo
Though there are a handful of genderless Pokémon, Sudowoodo, and other tree-like Pokémon—like Phantrump, Trevanant, and both variations of Exeggutor—can be either male or female, but it’s very difficult to spot the differences between their sexes. Male Sudowoodos, the only tree-like Pokémon that displays sexual dimorphism, are known to have slightly longer horn branches than their female counterparts.
