A/N: A new Fire Emblem announcement deserves a new chapter to add to the hype! (Also yes, E&T, the Mii Fighters are next.)
(The reason I'm including Shulk with third party is because I've often considered Xenoblade to be more "second-party" in a sense, but after reading a lot of reviews I decided to just label it as "Xenoblade")
Shulk
Chrom: Who is this young man? The sword on his back is unlike anything I've seen before.
Robin: It looks a touch like Sol, yet…
Frederick: This is Shulk, a Homs hailing from the Bionis. The sword you spy on his back, milord, is the Monado. It is an ancient sword that was once used to combat the Mechonis.
Lissa: Homs? Bionis? Mechonis? Slow down, Frederick! Your explanation is just raising more questions!
Frederick: I'm afraid those questions will have to wait, milady. There are two crucial things you must know about the Monado. First, the Monado can augment Shulk's attributes. The symbols on his sword indicates the change he has undergone. For every strength the Monado grants him, he is also penalized with a weakness. For example, in one form his attacks will do crippling damage to you, but he will not launch you very far.
Robin: So the key is to be mindful of his strengths while trying to exploit his weaknesses. This shouldn't be too difficult.
Frederick: Hold. There is one more thing you must know about the Monado. It has granted Shulk to see visions of the future, and he can use this ability to predict your attacks.
Lucina: Predict our attacks?! How can we defeat such an opponent?
Frederick: There is no need to panic. These prophecies have their limits. There is no way for Shulk to predict your grabs. If it looks like he's trying to outmaneuver you, simply grab hold of him and strike him fiercely!
Lucina: I must say, I'm rather envious of this boy. A sword that can predict the future would have been most helpful during our crusade to stop Grima. Perhaps I would not have made as many mistakes as I did…
Chrom: We got along fine without some omniscient sword. Your warnings of the future helped us pave a better tomorrow. That is more important than any misstep along the way.
Lucina: Father…Thank you.
Robin: Even though Shulk has the upper hand with his visions, we're all in control of the outcome of a battle. Let's show him how true warriors change the future!
Lucina: Yes, let's begin! I'm really feeling it!
Chrom: But we mustn't be careless!
Lissa: We must press on and on and on!
Frederick: (Gods, what a bunch of jokers…)
Pac-Man
Lissa: Pac-Man looks particularly hungry today. He's probably in the mood for some Fried Tactician and Princess a la Mode.
Lucina: Do you really have to be so macabre, Aunt Lissa? I don't really want to think about being food for this yellow ball.
Frederick: This "yellow ball" is probably one of the only fighters in this competition that could rival Mario in popularity. In fact, Pac-Man is a year older than our revered Italian plumber. He's quite the prominent figure in the industry.
Robin: The form he assumes now isn't as deadly or as popular as his original, in where he looks like a pizza missing a slice. Many of his attacks involve this form. His Final Smash turns him into a giant form of his retro self, and he'll happily gobble us up just like the ghosts in his game. Let's hope he never gets the Smash Ball.
Lucina: If he gets any funny ideas about eating us, we can always say Aunt Lissa is much tastier.
Lissa: Hey, you took the joke too far!
Mega Man
Chrom: They certainly outfitted this solider with a lot of peculiar weapons.
Frederick: Surely you're heard of Mega Man, my Lord. He's an autonomous super fighting robot created by Doctor Thomas Light.
Chrom: Mega Man, Pac-Man...The names of all of these famous fighters aren't exactly creative, are they?
Robin: If you remember, Mario was once called "Jumpman." Besides, what's in a name, anyway? What matters is these fighters are quite seasoned.
Lissa: I hear whenever Mega Man defeats another robot, he gains their power to use in his next fight!
Frederick: That's exactly right, milady. Mega Man will use many unique abilities in this fight that he's gathered from all of his adventures. There's also the classic Mega Buster and Charge Shot to be wary of.
Lucina: In a sense, Mega Man keeps a piece of every opponent he has slain with him. They're mementos of the many battles he's fought and the trials he's had to overcome.
Robin: One should never forget the experiences gained from fighting an opponent. We should know that better than anyone.
Chrom: Indeed. Now it's time to show Mega Man what we've learned through our journeys!
Robin & Lucina: Right!
Sonic
Lissa: If you're strong, you can fly, you can reach the other side of the rainbow~
Lucina: Rolling around at the speed of sound, got places to go gotta follow my rainbow~
Chrom: Um, what are you two doing? Aren't we going to talk about Sonic?
Lissa: Can you feel life, movin' through your mind? Oooh, looks like you came back for more!
Chrom: Honestly, you two, I think Sonic deserves a little more respect than this. I know he's had his blunders in the past, but Sonic is an iconic fighter known for his lighting fast speeds. I think you should take him seriously as an opponent. Back me up here, Robin.
Robin: Let's take a dive in Aquatic Mine! Once was a coal pit, but now it's a water ride!
Chrom: Oh gods, you too? *sigh* Look, Sonic can move from one end of the stage to the next in the blink of an eye, and his famous Homing Attack will do quite the number on you if you're not careful. It'll normally hit you from above, so it'll be hard to land a counter. He's tough, so don't underestimate him!
Lucina: The sky with stars so bright, the colors feel so right! I never felt like this I'll keep on running!
Chrom: *sigh* I give up.
Robin: Are you so sympathetic to Sonic because you both rock the color blue?
Chrom: Of course it's not something as ridiculously arbitrary as that! It's just…I happened to get my flying spin attack from Sonic's Homing Attack, OK? It's an incredible move.
Sonic: What goes up must come down. Yet my feet don't touch the ground!
Chrom: Oh come on, really?!