I have only one. I ripped this off from some sort of show, or movie that I don't know the name of. Conversation is not mine. This is just what I think he would say. Where Pikachu gets annoyed at Ash.
"What isn't no country I heard of!" - Pikachu. "They speak English in what?"
"What?" -Ash
"English mother ******, do you speak it!?" -Pikachu.
"What's going on?" -Dawn. Pikachu jumps on Dawn with electricity surging on his cheeks.
"Say, what, again! Say what one more god **** time! I dare you, I double dare you!" -Pikachu, about to electrocute Dawn
"What?" -Brock. "I'm sorry, I was too busy fantasising about Nurse Joy."
(That is what I think Pikachu would say, seriously.)