I played Pokemon when I was younger, it is a part of my history, and I am proud to be able to list the first 250 Pokemon,

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If you want to try it, go for it. Just remember to make sure it's balanced. Putting in some authentic music would make it more nostalgic as the game we played in our childhood.
I haven't seen any good Pokemon games on StarCraft, I think I've only played two, so the field for this kind of StarCarft map is wide open, go wild. If you want to do this, go for it.
It should be easily possible, the issue is whether you can keep up the inspiration to finish a map like this with many options and 150 Pokemon, and make it good.