Your favorite quote from a Pokemon game?

[Mienfoo]

I guess mine has got to be 'Oh no! I dropped the lift key!'

What about yours? :P

[Zigh]

"I, the Champion, fall in defeat... That was wonderful work. You were elegant, infuriatingly so. And yet it was utterly glorious! Kudos to you! You are a truly noble Pokémon Trainer!" ~Wallace

[Bulba the Great!]

Strong Pokémon. Weak Pokémon. That is only the selfish perception of people. Truly skilled Trainers should try to win with the Pokémon they love best.

Karen post-defeat in HG/SS.

[AquaWarrior]

Strong Pokémon. Weak Pokémon. That is only the selfish perception of people. Truly skilled Trainers should try to win with the Pokémon they love best.

This one.

[SteelKing 2012]

"Life is a serious battle, and you have to use the tools you're given. It's more important to master the cards you're holding than to complain about the ones your opponents were dealt."--Grimsley, Unova elite four.--

[(·-·)(o_O)]

Pika- Pika! -by Pikachu
I'm just kidding though or maybe I'm not.
Here's a real one: It's more important to master the cards you're holding than to complain about the ones you're opponents dealt
-Grimsley

[kusari]

One of these three:

"A real warrior doesn't dash off in pursuit of the next victory, nor throw a fit when experiencing a loss. A real warrior ponders the next battle.

- Grimsley, Unova Elite Four

Even if we don't understand each other, that's not a reason to reject each other. There are two sides to any argument. Is there one point of view that has all the answers? Give it some thought.

- Alder, Unova Pokemon Champion

There are bad ways to win and good ways to lose. What's interesting and troubling is that it's not always clear which is which. A flipped coin doesn't always land heads or tails. Sometimes it may never land at all...

- Grimsley, Unova Elite Four

[Atlidevil]

"I dont respect people with different opinions" - Nameless Team Plasma member in Relic Castle.

[Navarch]

"Strong Pokémon. Weak Pokémon. That is only the selfish perception of people. Truly skilled Trainers should try to win with the Pokémon they love best." - Karen of the Elite Four

[Azran Flame]

"My Rattata is the top percentage of all Rattata!" - Youngster Joey

...In all seriousness, though:
"Strong Pokémon. Weak Pokémon. That is only the selfish perception of people. Truly skilled Trainers should try to win with the Pokémon they love best." - Elite Four Karen

[Zwei]

"It doesn't matter where we go, there's always someone that doesn't agree with us…"
- Team Rocket Executive Proton

[SherlockJones]

Even if we don't understand each other, that's not a reason to reject each other.There are two sides to any argument. Is there one point of view that has all the answers?

[Endolise]

I can think of quite a few:

Clay: "There's always room for folks to grow and change, ain't there? And, if ya only go after what ya think is right, ya might end up rejectin' all thoughts and opinions other than yer own. That's mighty dangerous."
Team Galactic Grunt: "This brat’s tough! Like, really, really tough! Tougher than I can put into words, and I know a lot of words!"
Team Plasma Grunt: "This is bad... Badbadbadbadbadbadbad! Bad for Team Plasma! Or Plasbad, for short!"
Team Plasma Grunt: "It's my turn! Actually, it's Trubbish time!"
Baker Chelsie: "Like uncooked dough, my Pokémon are sticky!"
Youngster Kevin: "These are not shorts! These are half-pants!"
Firebreather Walt: "Mostly I breathe fire, but want to exchange numbers?"

"I dont respect people with different opinions" - Nameless Team Plasma member in Relic Castle.

x'DDDDD

Ahh, that one always gets me.

[YourPermanentRecord631]

Youngster Joeys quote despite evolving his "top percentage Rattata" to a Raticate.

[deoxysdude94]

It's hard to call you this, but... Father! Please understand. Pokémon are not tools. Pokémon and humans take each other to greater heights. They are our wonderful partners. Some humans understand this. Why can't you?"

I love this part of B2W2

[BNator92]

"Hey! I was looking forward to seeing you, <player>! My rival should be strong to keep me sharp! While working on my Pokédex, I looked all over for powerful Pokémon! Not only that, I assembled teams that would beat any Pokémon type! And now! I am the Pokémon League Champion! <Player>! Do you know what that means? I'll tell you! I am the most powerful trainer in the world!"

That last line in particular.

[RaZoR LeAf]

It's either "kekekekekekeke" (RB Channeller) or "fufufufufufufufu" (GS Sage I think? Might be a Kung Fu guy)

[The Benmeister]

And cue the hoards of predictable people that quote Karen!

I'm not sure about favourite, but I love the Team Magma Grunt in Pokemon Emerald in the Magma Hideout who is positioned next to some lava, 'What did I do to deserve this guard posting? My left ear is burning up!'

[Excitable Boy]

Team Galactic Nap Room: Ensure the bed is unoccupied before getting into it!

[Azran Flame]

Team Galactic Nap Room: Ensure the bed is unoccupied before getting into it!

How could I have forgotten that?

I remember assuming that it was to make sure that the beds didn't collapse when I first read that line when I was 8. =p

[Amiちゃん]

"I like shorts, they are comfy and easy to wear" - random bug catcher
"I'll beat you with the Magikarp my dad gave me" - some youngster (i think)
"I'll knock your Pokemon into orbit!" Team Galactic grunt
"I'll show you how scary Team Magma/Aqua can be!" Team Magma/Aqua grunt
"Don't bug me.." random bug catcher
"I'm going to unleash my rage..." BW2 rival

[Battlestar]

You can't change the world without a little pain.
-Team Plasma grunt

[Ver-mont]

"What a waste… not to use your strength to do bad things! Feh… People like you will never in a million years understand our brilliance!"
(Ariana)

"Lately some people from the Radio Station came around, wanting to do a piece on me, or something. My fans definitely won't want to miss watching that! Oh, no! I was confused! It's radio! All those people turning in, and they won't be able to see my glorious face! What about TV? Why hasn't a TV crew come to do a piece on me?!"
(Clair)

I won't mention Karen's quote again since a lot of people already did it, but it's one of the best.

[Crimson Penguin]

Surprised nobody's quoted Cynthia yet.

"...The places we are born. The time we spend living... The languages we speak... We are all different. But the presence of Pokémon unites us. We share our lives with our Pokémon and our happiness grows as we all become greater than we were alone. That is why we can battle and trade with anyone we choose... Since there is sadness, we can feel joy. When there is anger, compassion is born..." ~After Cyrus' defeat in the Distortion World.

And the best quote from the Battle Frontier in Emerald: I SWALLOW SLUDGE TO TRANSFORM MYSELF

What were they thinking...

[Winter02]

"N's heart is pure and innocent. But there is nothing more beautiful and terrifying than innocence."
- Concordia in Black & White

"Bravo! I feel inspired in my heart! It brings back a memory of that day long ago... I went out to the lake with your father that day... We were attacked by a wild Pokémon. We fended it off, but I don't recall how. It was that desperate. That was my first step as a Trainer. I wonder if the professor is doing well?"
- Palmer after being defeated for the second time in Diamond, Pearl & Platinum

...these are the ones I can think of right now.