Pikachu
Lissa: Aww, look at that adorable little guy! I just want to give it a big hug and pinch his cheeks!
Frederick: Not wise, milady. That's Pikachu, the Mouse Pokémon. The rosy red cheeks you see are actually small sacs which house powerful electric charges. If you startle it, it might shock you.
Chrom: It doesn't sound like it would make a good house pet.
Robin: It will try to attack us with small bolts of electricity. My own dose of Thunder should be a good countermeasure against that. As for you, Lucina, you should have many opportunities to counter Pikachu's moves, especially its Skull Bash attack.
Lucina: …
Robin: Is something wrong, Lucina?
Lucina: It's just…must we fight such an adorable creature? It seems so cruel.
Robin: …Lucina, as Frederick said, this thing will zap you without a moment's thought. Keep that in mind.
Lissa: Yeah, but don't think it be fun to cuddle with it or maybe dress it up? Maybe give it a cool jacket or something? Oh, oh, or dress it like a southern belle!
Lucina: *squeal* Just thinking about how adorable that would be makes me so giddy!
Robin: *sigh*
Charizard
Lucina: If our opponent this time is a dragon, Falchion should make swift work of it.
Fredrick: Actually, milady, Charizard is not a Dragon-type, despite his appearance. It's actually a Fire/Flying-type. The Flame Pokémon's wings can carry this Pokémon close to an altitude of 4,600 feet and it can blow out fire at very high temperatures.
Robin: That's rather specific intel, Frederick. Where are you getting all of this information from?
Frederick: In order to aid in our fights against Pokémon, I acquired an interesting device called a "Pokedex". It's filled with many interesting facts about our opponents.
Lissa: Oh, I've heard about the Pokedex! Are you planning on catching them all, Frederick? I'm sure Professor Oak would appreciate it!
Frederick: I'm afraid my services to you and Lord Chrom keep me busy enough, milady. I have no desire to "catch them all."
Chrom: I doubt you would have much luck with that anyway. New species of Pokémon sprout like weeds every few years, I hear.
Robin: Trivia is nice, Frederick, but do you have any info on how it fights?
Frederick: As I said, Charizard can spit fire out of its mouth and do quite a bit of damage. It attacks with its wings and can throw large boulders at you to send you flying off the stage. You should be cautious of his "Flare Blitz" move. This powerful attack will knock you back pretty far, but it will also hurt Charizard with recoil damage. If you can stop this move from hitting you, it'll surely backfire for our flying friend here. Shields and projectiles are recommended.
Lucina: Dragon or no dragon, Falchion will strike it down just the same!
Frederick: Charizard becomes a true dragon when it goes through a special transformation called Mega Evolution. However, when this transformation occurs, he'll become too powerful to effectively attack. When he becomes Mega Charizard X, this battle will become an endurance test until he reverts to his original form.
Lucario
Robin: What does that little contraption of yours have to say about this one, Frederick?
Frederick: This is Lucario, the Aura Pokémon. "By catching the aura emanating from others, it can read their thoughts and movements." Or so the Pokedex says.
Lucina: Aura?
Frederick: Yes, I believe the aura is that blue energy flowing through its hands. You can think of it as your life energy. Lucario is able to channel this energy and harness its power. The most important thing to note about Lucario is that the more damage it receives, the stronger his aura energy becomes. If you're doing up against Lucario, you best finish it as swiftly as you can. Allowing it to sustain tons of damage can prove cataclysmic.
Robin: An opponent that gets stronger the weaker it gets? How fascinating. This'll be an interesting battle indeed.
Jigglypuff
Chrom: This Pokémon looks so light it seems like it'll float away at any second.
Frederick: Jigglypuff is indeed one of the lightest fighters here, milord. It has earned the title of the "Balloon Pokémon." "Jigglypuff's vocal cords can freely adjust the wavelength of its voice. This Pokémon uses this ability to sing at precisely the right wavelength to make its foes most drowsy." So says the Pokedex, at least.
Lucina: I hear Jigglypuff just wants to impress people with her singing, but she gets offended when they're to put to sleep by her voice.
Lissa: Yeah, and then she draws all over your face while you sleep! Talk about rude!
Robin: Lissa, you've done that to me on three separate occasions.
Lissa: Yeah, but…when I do it, it's cute and hilarious.
Robin: Yeah, sure…Anyway, Jigglypuff is very aerodynamic and can rush you down if you let her. She also tries to slam into you by charging up her Rollout attack.
Frederick: Don't forget about her Rest attack. If she manages to land it successfully, the effects will be devastating for you.
Lucina: Indeed, but if she misses, she'll be left vulnerable for a long time. As useful as being light as a feather is, this makes her easier to launch, and this window of time when she sleeps should be the perfect opportunity to send her flying.
Greninja
Frederick: This is Greninja, the Ninja Pokémon. According to the Pokedex, "it appears and vanishes with a ninja's grace. It toys with its enemies using swift movements, while slicing them with throwing stars of sharpest water."
Lissa: Eugh, that scarf of his…Please don't tell me that's its tongue.
Chrom: It looks like it. A scarf covering the mouth certainly adds to the mystery and camouflage ninjas are known for, but a tongue scarf just sounds painful…
Lissa: Blech! I don't wanna get anywhere near that thing! This is why I stay as far away from frogs are possible.
Robin: That is unless you're stuffing them down my collar…
Lissa: C'mon, you're still not over that?
Frederick: Just like any skilled ninja, Greninja has a penchant for subterfuge and prowling in the shadows. In the blink of an eye he can vanish and reappear in front of you with its Shadow Sneak move. The shadow that glides toward you like a crosshair will give indication as to where it'll strike. Substitute will distract you with a decoy Greninja, while the original attempts to strike from behind while you're vulnerable. If you're careful and don't strike too eagerly, you should be able to spot a faker.
Lucina: If Greninja is a Water-type, I'm sure he'll be conductive enough to take a massive hit from Thoron.
Robin: Ah, I do so love having the type advantage.
Mewtwo
Chrom: …Hmm? It was my understanding that Mewtwo was going to grace us with a duel, but there's nobody to be found.
Lissa: Yeah, what gives?
Anna: Oh, do I hear a couple of eager beavers trying to sneak a peek at my star? Man, I'm so lucky to have bagged such a crowd drawer! I'll be swimming in gold in no time!
Robin: …Anna? What are you doing here?
Anna: Oh, it's you guys…
Robin: You don't have to sound so disappointed…Now are you going to answer my question?
Anna: If you most know, I've put merchantry on the backburner for now and became Mewtwo's agent.
Chrom: You…became the agent of a science experiment gone amok? That's an interesting first client…What money making scheme is this? Is this anything like what you did with Tiki?
Anna: Oh, woe is me! Must you look at this cute, innocent girl like some sort of vile thief looking to pilfer from the unsuspecting?
Chrom: Quite frankly, yes.
Anna: Not one to mince words, are you Chrom? Well, since we're comrades in arms I suppose I can let you in on my hei—I mean, my latest business venture. You know how these Smash fans foam at the mouth for Mewtwo? Since Mewtwo is of the most requested Smash veterans, I saw a golden opportunity to milk as much money out of that fame as possible. I struck a deal with the higher ups at Smash that in order to make Mewtwo playable, you'll have to buy both versions of the newest Smash!
Lissa: What?!
Lucina: Th-That's highway robbery!
Frederick: How did you even get this power hungry creature to accept you as its agent? I didn't think it had any use for coin.
Anna: Oh, he was desperate to get back into Smash to bust some heads, so when I told him I could get him back in no sweat he leapt at the chance. He's even letting me keep his share of the profit! What a sweetheart!
Chrom: I can't believe this…paying for both versions just to fight one competitor! You've done some avaricious things in the past, Anna, but this is going too far!
Anna: Avaricious? Me? If it weren't for my brilliant proposal to the higher ups Mewtwo wouldn't even be in Smash! Count yourself lucky! Besides, who can ever have too much Smash? I wish I could give you guys a discount, but y'know, the big wigs wouldn't allow it…and I don't want to.
Robin: *sigh* So if we pay for both versions, then can we fight Mewtwo?
Anna: Absolutely! …In spring. He's not ready yet.
Lucina: Not ready yet?! The gall of this Pokémon!
Robin: Well, I guess we'll have to come back when Mewtwo can fight. It'll probably wind up costing us an arm and a leg though…
