Ash, Professor Oak and others in “Friends, Rivals, Lend me Your Spirit!”

Hey, we ran into Paul.

Professor Oak

Well, well. I was hoping he'd surprise you two here. You see, Paul happened to stop by yesterday, out of the blue.

Professor Oak is a preeminent figure in Pokémon research. If someone wants to know about Pokémon, he's the best to ask. Nothing strange about that.

Roar! [Let's go Gengar, you've some work to do.]

Gengar! [Right, let's go!]

Let's all train. [Charizard, Gengar and the rest of Ash's Fire-mons comply, minus Infernape?]

Pikachu

Pikachu! [Let's go!]

Kay, buddy! [Not so fast, Ash]

You should leave it to the Pokémon. That's what this place is for.

Professor Oak

I'll keep an eye on them! I think you and Paul have things to talk about.

Right!

Infernape, why don't you go and join them?

Infernape? Infernape! [Really? Heading off, Ash!]

Infernape, you take care of Gengar, okay?

Infernape! [Right!] [runs off and carries Professor Oak over his shoulders!]

Professor Oak

Whoa! Hey, stop!

So, Infernape does what Paul does it to do too?

Yeah, cause Paul was its trainer before I was. [Those of you who do not know about Infernape and how he played a part in Ash and Paul's vicious rivalry towards each other during Diamond and Pearl series, here's a brief recap]

Ash met Paul in the Sinnoh Region. Paul put his Chimchar through some extreme training, but when it didn't meet his expectations, he abandoned it. So, Ash welcomed Chimchar into his group. A deep friendship developed which led to Chimchar evolve all the way into Infernape.

So that's what happened.

Yeah and Infernape's gotten really strong.

Grookey-key-key. [Whoa, look at Electivire's tails!] [Electivire's twin tails are swinging back and forth gently]

[Grookey jumps off Goh's shoulders] Grookey, hang on!

Pikachu

Pika! [Hey, wait!]

Vire. [What is it?]

Electivire. [Got it!] [Pikachu and Grookey applaud at Electivire's performance]

Electivire, go keep them busy.

Electivire. [Sure thing.]