As someone who's played every game in the Golden Sun trilogy (beat the first, just got the ship in The Lost Age, and decently through Dark Dawn, which is not awful by any stretch of the imagination), I grew to love the franchise after I got the original recommended to my one day. And I feel Isaac is the one who deserves the spot in Smash the most out of the 16 playable characters in the series. Isaac is 20 in this fic, as he's 47 in Dark Dawn, which is 30 years after The Lost Age.

Of course, if you saw the A/N last chapter, you'll know that Matthew's following in daddy's footsteps, but that won't be until the finale.

And if you're gonna say "Isaac's an Assist Trophy," I already said that this was an AU, so read the description before you write a review.

Anyways, the Golden Sun released Alchemy back into the world, saving Weyard, but not without consequences...

Ruins of Vale...

Isaac sighed as he sheathed his Gaia Blade. It had been three years since he, Garet, Ivan, Mia, Jenna, Felix, Sheba, and Piers had bested the Doom Dragon (which turned out to be his father as well as Jenna and Felix's parents) and restored Alchemy to the world. The Golden Sun had revitalized all of Weyard, bringing life back to the dying land, but not without numerous side effects.

There had been many natural disasters in the last three years, including a massive tidal wave that had wiped out the town of Izumo, along with reports of humans turning into beasts, and vice versa. There was also the mystery of the Psynergy Vortexes, which Kraden had theorized to be an aftereffect of the unleashing of the Golden Sun as a countermeasure to the surplus Alchemy that flowed in the land.

Regardless, for Isaac, life wasn't that bad. After the destruction of Vale, his family moved into Kalay, along with Garet's and Jenna's, and he was even in a relationship with the latter. Felix, however, had mysteriously left a year ago and had not been seen since.

Shaking those thoughts out of his head, Isaac remembered why he was sent to his old hometown by Kraden: to investigate an abnormally large Psynergy Vortex that had appeared in the area.

As he stepped into the ruins of Vale, Isaac had heard a large whoosh coming from where Jenna and Felix's house once stood. Now very curious, he ran to where the noise had come from, only to find nothing.

Confused, Isaac stepped further into the town and began to investigate.

Master Hand, now at the base of Mount Aleph, snapped his fingers in frustration upon the realization that he had missed the Venus Adept by that much.

Isaac was about to leave after not finding anything until he heard a loud crack coming from where Mt. Aleph once stood. After hearing a loud thud from the same location, he ran to where the noises had come from.

As Master Hand was massaging his wounds from punching the face of Mt. Aleph in frustration, he heard footsteps coming from behind him. Master Hand, after hearing the person yell, "Anyone in there? It's dangerous, so leave!" he knew it was Isaac, so he put on the shades, reverting to his human disguise, and tried his best to look casual, which wasn't easy with his outfit.

Isaac ran up to the figure that stood there, asking, "How and why did you find the ruins of Vale?"

"I would ask you the same question."

Isaac replied, "Classified business."

Master Hand, frustrated with not receiving a straight answer, decided to read Isaac's mind.

"Abnormally large Psynergy Vortex was spotted around Mt. Aleph... if the first few were any indication, this'll be very draining on the land..."

Now knowing Isaac's motives, Master Hand said, "I can show you to the Psynergy Vortex if you wish."

That got Isaac's attention.

"Really?"

"I can! It's a little dangerous, though..."

"Well, if you say so..."

Isaac followed the mysterious man, now highly suspicious about the fact that he had known about Psynergy Vortexes, but willing to follow if there really was a Psynergy Vortex behind the mountain.

The man's voice snapped Isaac out of his thoughts.

"We're here!"

Isaac paled as he looked up at the massive blob of anti-Psynergy, which quickly changed to confusion as it began to shrink. The mysterious man had snapped his fingers, and the vortex shrunk into nothingness.

Now incensed, Isaac unsheathed his sword, pointed it at the man's throat, and snarled, "So, you're doing this as a joke, huh? Who are you allied with, and what is your purpose here in Weyard?"

The man's shades had been knocked off in the small commotion, which revealed his eyes to Isaac. They were unlike any he had ever seen, with them being pitch-black with white lines running through them, with the vertical line slightly off to the left, and the horizontal line closer to the bottom of the circle. The man began to emit off a bright light, and Isaac shielded his eyes.

What appeared before him was someone Isaac hadn't seen in 4 years.

Master Hand floated before the Adept before grumbling, "Well, there goes the surprise."

Isaac, now re-sheathing his sword, asked, "But why are you here now?"

Master Hand said, "Well, Isaac, there's a new Super Smash Brothers tournament on the horizon..."

"So you've come back to make me an Assist Trophy again?"

Master Hand recoiled before saying, "I never make personal appearances to those who'll be anything less than a fighter when it comes to the recruitment process, so that leaves you only one option, then."

Isaac stared in shock. That could only mean...

Master Hand handed an envelope to Isaac, saying, "Welcome to the Super Smash Brothers tournament, Isaac. Please step through the vortex on your left."

Isaac looked at the swirl of dark energy next to him, and Master Hand laughed and said, "Oh, don't worry, this one isn't a Psynergy Vortex. I will move your family and friends to the town outside the Mansion, too."

Nodding, Isaac stepped through the portal, and a little card with the number 72 appeared in his hand. Looking to his right, Isaac saw a building that read, "For Newcomers."

Excited, the Venus Adept ran towards the building.

Meanwhile, Felix woke up to find himself back in his own house.

"What the hell happened when I was asleep?"

Jenna ran up to him, animatedly saying, "Felix, you gotta come outside! We're not in Weyard anymore!"

Felix walked outside, and he realized Jenna was right. In fact, the Warriors of Vale had all stepped out of the houses near them with similar looks of confusion, with the exception of Isaac, even though both Kyle and Dora stepped out of a house.

Felix blankly uttered, "Can I go back to sleep now, please?"

Dark Dawn didn't really explain much of its new phenomena, so I decided to create my own reasons, like with the Psynergy Vortexes.

Anyways, the eventual World of Light story's gonna have... 78 Smashers to keep track of, holy crap. (set in this AU)

Our last stop before the finale belongs to Microsoft's golden duo; Banjo and Kazooie!