Pokémon light platinum is a Pokémon Ruby rom hack. You can find more information about it here: http://wesleyfg.weebly.com/pokeacutemonlightplatinum.html
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https://www.youtube.com/watch?v=h_Icujg6BOY
A game I was requested to play by the author. While not a bad hack it unfortunately seems a bit bland.
http://www.smwcentral.net/?p=section&a=details&id=13462
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https://www.youtube.com/watch?v=1gUpiBTyJmU
brainwashed yoshis. curse you Iggy.
for those of you who wish to play as well: http://www.smwcentral.net/?p=showhack&id=2318
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https://www.youtube.com/watch?v=aHDdnAqNupg