Pokemon can be so much more.

[Frogger]

Wright said:

So, you're saying Pokemon Colosseum isn't a Pokemon game? No, no, wait, you're saying that objectively Pokemon Colosseum isn't a Pokemon game?

You can trade literally every Pokemon that existed at the time to Colosseum, so I don't know what point you're trying to make. Almost every Pokemon game has unobtainable Pokemon. The difference between them and what you're suggesting is that one, those Pokemon still exist in that universe, and two, those missing Pokemon can be traded over so you can still use your favorites eventually. Pokemon is the poster child for a typical Pokemon spin off.