So I got into a bunch of arguments with this guy who didn't know much about Pokemon. List in comments.

1: The argument above since they believed in the FANON version
2: Since Groudon was fighting Kyogre, and I was as a ditto transformed into Rayquaza to end the fight, they suddenly changed their role into Ho Oh and attacked me saying that Rayquaza would be fighting too EVEN THOUGH Rayquaza is the one that ends the battles
3: they said "Jolteon is orange" since before I chose to be ditto, I chose Jolteon.
4: I forgot the rest, but they actually left the roleplay to prove me wrong that they'd stay (Absolute fool)

Send that guy this image
So he knows he’s wrong and should stop pretending to know everything about Pokémon.
Is it on imgflip? If it is let me trivia him

They're not on imgflip, no.

Wait this was two different people now that I think about it-

it IS partially black and partially white but it does only have one form.

fr have you even seen missingno? in what multiverse is it purple?

The purple one is the fanon bird forms, and MissingNo actually does have five forms; the version in red/blue, the version in yellow, The two fossil forms, and the ghost form.