#10- Manaphy. The reason is because Manaphy's nickname is "Prince of the sea" suggesting that Manaphy is male, so I believe the gender ratio for Manaphy should be 100% male.
#9- Numerous Fighting-type Pokémon. It's just so hard me to picture Fighting-type Pokémon as female because they look so masculine. However there are some exceptions such as Scraggy, Heracross, Meditite, Medicham,, and Mega Loppunny to name a few, but for the most part I think most Fighting-types should be 100% male.
#8- Phione. Phione should be 100% male in my opinion.
#7- Braixen, Snubull, Mawile, and multiple others....