This seems interesting, could be a place to let my ideas loose....
I was thinking a Fire starter named Tiggy, a water starter named Hippy and a Grass starter named Mischree
Tiggy:
Fire
Fire Tiger Pokemon
Tiggy tend to live near or around Volcanos, so they can get ready for the long climb up the Volcano upon evolution.
Hippy:
Water
Little Hippo Pokemon
Hippy like the cold, but they are too small to withstand the cold, they are incapapble of taking care of themselves for a long time, when they are born they are defenceless and they remain so for 2 months.
They tend to live near or around cold areas and around lakes and such.
Mischree:
Grass
Mischeivous Pokemon
Mischree like to scare people and play pranks! they are among the most mischeivous and devilish pokemon but they would never dare to harm anyone, they primarily pretend to be normal trees and then jump people.
The owner of a Mischree should be wary not to let themeselves be fooled by Mischree's devilish pranks.
I'm a no-good spriter so i can only ask someone else to do this for me.
Tiggy must look cute but fierce, make it small, about the size of a skitty or a growlithe...
Colors must vary from different shades of Orange, to dark oranges please.
Hippy must look cute, it is obviously a hippo, so it must look like one, colors may vary from different shades of blue to some light blues. siz must resemble growlithe's.
Mischree must be in the shape of a tree, it must have a kind of face like Mischeivous or something, and maybe make it look a little ghostish as it's evos will be ghost types....
I was also thinking of these, but i haven't compeletely invisioned they're appearances yet so...
Psyion:
Psychic
The Mystic Lion Pokemon
Psyion are very Mysterious creatures, when walking into fog they can compeletely dissapear, they can teleport anywhere they want when they want to, so it's hard to catch one and to train it, but if you gain it's trust it will do everything in it's power to protect you from harm, Not too much is known about them, as they keep their closest secrets even from their own kin.
Cheetark
Dark
The Cheater Pokemon
Never play a game with Cheetark, it will most certainly cheat, and you'll never know they did, they are sleek devilish and sometimes considered evil, they are some of the best hunters around, and they never miss their prey, however they have good sides, gain one's trust and it will stay loyal to you forever, but unfortuneatly they wouldn't have many feelings for your friends, they would only stay loyal to you, unless they've come to trust your friends aswell, they do not tend well towards strangers, and they will attack anyon or anything that threatens them or their loved ones without hesitation.
Kangabang
Fighting
The Kung-fu Pokemon
Kangabang are skilled Kung-fu fighters, they are born with no knowledge whatsever but they are quick thinkers, fast reacters and quick learners, they are headstrong and never give up without a fight, they are taught martial arts by their parents and have martial contests to see who will be the leader of the pack, Owners of a Kangabang should be wary that this keen fighter does not get into any sort of brawl situations, otherwise they are a great pokemon to own.
These are starters as well, they will have evolutions, so don't make them too big or too small, they are a side branch of starter types that i constructed:
Fire kills grass wich kills water wich kills fire
Psychic kills fighting wich kills dark wich kills psychic!
Hope you like'em and hope you sprite 'em, LOL. ;)