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From Bulbapedia, the community-driven Pokémon encyclopedia.
the Invisible shiny bulbasaur is a glitch pokemon found in sinnohs oreburgh mines. it appears at LV.0 with no health and no sprite. it has the cry of a bulbasaur and shower of sparks like a shiny pokemon.
http://www.pcplanets.com/videoyoutube-jltCqqkywRI.shtml