Your pokemon in my mmo - what it means

For all the people out there whose pokemon I'm gonna be using in my mmo, you will have a free beta pass to try the game out right now whilst it's being made.
If I've yet to give you an invitation and I'm using your pokemon let me know!

Anyway pokemon I still need;
These should all be pokemon that you can find early on! That doesn't mean they have to be weak, just that they're not really special ie. a rainbow serpent or something.

Cat pokemon - there's already so many cat pokemon it would have to look quite different.
City/urban pokemon - I've got a rat and a pigeon but I would ideally like some sort of city bug, ie cockroach.
Nocturnal pokemon - Pokemon that you would only be able to find at night. I have a bug already (mosquito) but something like a firefly would still work, owls, etc.
Cave pokemon - cave animals - I have plenty of non animal living rocks.
Grass types - I need a lot of these.
Water types - that live on land (like marill)
Ghost types - Some that you can find early on
Nurse type pokemon - like chansey/audino etc.
Horse - A horse would be useful, but not similar to ponyta. If it could just look normal not elemental kinda like how buneary looks like a normal brown rabbit (unlike nidorans, azumarill etc)
Non-animal pokemon - some general creative non-animal pokemon would be cool. I was just reading an article about the winter bug and norovirus and thought it would be interesting to make a pokemon based on this for example!

Thanks guys I love seeing possible candidates even if I dont accept them, the creativity is really surprising!