Here for you this awesome Bulbasaur model directly from the Pokémon universe, originally made by CarryTheWhat for 3D Central and fixed by Me.
The model wasn't manifold and didn't respect a proper unit so i scaled it to be exactly 7cm high.
You may want to add some supports for the neck and especially for the back of the shell.
I included a low quality version of the same model for a proper 3D preview in Thingiverse and in the case you have a bad computer. :3
Have a nice print!