User blog comment:ERBofSmoshery/Calvin and Hobbes vs Ash and Pikachu - Epic Rap Battles of History: Season 2 Episode 3/@comment-25263388-20151017002958/@comment-25263388-20151017004008

He could just say Pikachu to like, do a thunderbolt or some shit

The Pokemon who have shown the ability to speak have been clearly set apart as more intelligent.

While they are able to convey emotions and intentions, Pikachu has never actually spoken. I tend to like, think of them as babies before they learn to speak.