I'm just going to continue with more pokemon. I hope you don't mind, but there are a lot of them.
Noctowl
Its eyes are specially adapted. They concentrate even faint light and enable it to see in the dark.
Keen Eye. I'm starting to think Keen Eye should give pokemon permanent +2 accuracy as well as making accuracy drops impossible. What does +2 accuracy even do anyway? Meh, probably better in flavourmons than in regular pokemon.
Ledian
It uses starlight as energy. When more stars appear at night, the patterns on its back grow larger.
If fighting at night, outside, with no weather effects, Ledian gets +20% hp, special defense, special attack, and speed. (it's weak, so I'm giving it a sizable buff in specific conditions. I think the location of battles will have to be a factor here.)
Ariados
Ariados's feet are tipped with tiny hooked claws that enable it to scuttle on ceilings and vertical walls. This Pokémon constricts the foe with thin and strong silk webbing.
Um, Idk... webbing move have +1 priority? (String shot, constrict, spider web, sticky web?)
Crobat
It flies so silently through the dark on its four wings that it may not be noticed even when nearby.
Illlusion? This seems to be a common ability though. Either that, or Crobat gets +1 priority the turn it switches in.
Lanturn
It blinds prey with an intense burst of light, then swallows the immobilized prey in a single gulp.
Flash has +1 priority and a 50% chance of flinching the target. This move has a chance of failing if used consecutively.
Xatu (skipping togekiss because of later game evo)
Xatu stands rooted and still in one spot all day long. People believe that this Pokémon does so out of fear of the terrible things it has foreseen in the future.
Future sight does +50% damage. Between using future sight and when it hits, Xatu may not use any physical attacks.
Anyway, I'll work on more later. This is pretty fun. I hope you don't all hate me for hijacking this thread.