"Trendy Phrases" Help

[Phosphatide]

So I've spent the past two days running around in circles trying to find the guy that allowed me to do this.

I know where the guy who gives out trendy phrases is (it's in the Wiki article, after all), but then there's someone that allows you to change what you would say if someone were to fight your data in the Trainer House. Like how right now everyone is just saying "Please COME ON!" and clearly that can be edited. Unfortunately there's no Bulbapedia article on this (not just for HG/SS either), which is why I'm here.

So far I've found the guy in the Violet City Pokécenter that can change your appearance, but that's all. It's been bugging me that I actually found this guy a while back but decided to complete it later. Except I forgot where he was.

Someone help before I explode.

 

[Dr. GM]

...I think this belongs in the Simple Questions thread. You might wanna look there...

 

[Orion-Sama]

He's in the house above of the Cycling Road, left of Celadon City. You reach the house by cutting the tree before the Cycling Road's gate.

 

[Phosphatide]

...I think this belongs in the Simple Questions thread. You might wanna look there...

if it were simple i would've gotten an answer sometime yesterday
ba dum psh

But yeah, I was debating whether to put it in there or not. Sorry if I chose wrong.

He's in the house above of the Cycling Road, left of Celadon City. You reach the house by cutting the tree before the Cycling Road's gate.

Yeah, but that's not who I was looking for. I said "trendy phrases" in the topic title because I didn't know what else to call it.