>>18533470They most likely couldn't because they wouldn't be able to type our language, although some might be able to. Also, they may not physically be able to type.
Most pokemon seem to have an intelligence level about that of humans, but it depends on the specific 'mon. It varies depending on your source material and your definition.
If it's anime you look at, then certainly, if it's the game, there are few/no specific examples I can think of.
If it's manga, then pretty much.