These images were the first pics of GS Pokémon GameFreak released.
2 of the Pokémon did not make it into the final version in any way (Kurusu and Honooguma) but they might turn up in Pokémon Advance...
Translates as "hoop".
A prototype of Quilfish.(Harisen)
(Mariru was its Japanese name)
Translates as "cross".
Possibly an unevolved Seel.
"Ha" is "leaf" in Japanese.
(Happa means "explosion")
Translates as "flame bear".
Looks like a fire Raichu
Translates as "Giraffe strength"
(Kirinriki is its Japanese name)