So I know some interesting pokefacts, so I thought I should share them.
Cubone is the most depressing Pokemon I've heard of
because Every cubone is a baby Kangaskhan whose mother died and so it wears it'd mother's skull on it's head. Fire red pokedex entry: It wears the skull of its dead mother on its head. When it becomes lonesome, it is said to cry loudly.
In the pokemon world people EAT pokemon!
This is hinted in Gold/Silver in the story of these games you discover that Team Rocket are cutting off Slowpoke tails and selling them! A Team Ricket member tries to sell you one and says it a "Delicious Delicacy" and in the Anime you see them eating meat and we all know that there are know animals in pokemon, so where does the meat come from? You know where.
Venonat was supposed to evovle into butterfree and Metapod was supposed to evovle into Venonat!
Most people only know about the Venonat to Butterfree evo and not the Metapod one here is some what proof for both in there appearences:
First with Butterfree and Venonat:
Well just look at the colour of both of them at first very similar,
So are there eyes, antennas, Hands and mouths.
Now with Metapod and Venonat:
First of all Look at the top of Metapods head then at Venomoths, there a similar, Caterpie's hands and Venomoth's are somewhat similar and so are their eyes.
The reason for this?
Well the games and the Anime where planned at the same time and the writers decided that caterpie would be a good second pokemon for Ash seeing as it's a beginer pokemon, they also thought Venomoth would be unappealing for kids if they saw it alot and they thought that kids would see Butterfree would be a better choice so they switched the two arround to better fit the story.
There is a few until I remember more and please share you own!