Phineas and Ferb's group, and Fairy Tail wizards, consisting of Natsu, Romeo, Happy, Lucy, Wendy, Carla, Gray, and Juvia are on a job to catch this person that tends to cause trouble at a casino with a reward of 200,000 Jewels.
"I wonder how come Erza didn't come with us." Irving said.
"Too bad 'cause she's gonna miss out in the action!" Natsu said.
"Okay this town has four casinos, named after 4 directions, North, East, South, and West, so we'll split into four groups, first, we have Natsu, Lucy, mine and Wendy's group." Gray said.
"I will go on your group my beloved Gray." Juvia declared.
"Hey Romeo, you can come with me." Natsu offered.
"Sure!" Romeo said, accepting the offer.
"Don't worry Lucy," Happy said, "with me on your group you won't have to worry about this mysterious troublemaker."
"Yeah, I feel much safer with you on my group, Happy." Lucy said sarcastically.
"Carla are you coming with me?" Wendy asked.
"Of course, child, I have to keep you safe from this hooligan that we're supposed to stop." Carla said.
"Let's see, I'll just pick random from you guys." Natsu says to Phineas and Ferb's group.
Natsu randomly selects Phineas, Isabella, Irving, and Candace.
"Hey, looks like you're coming with me Phineas." Natsu said
"Well, looks like the Flame for Brains picked four, so I guess the rest of us pick three." Gray said.
Then suddenly, "Did you just call me Flame for Brains, ya Icy Freak!?" Natsu yells.
"And what if I did, what's it to you, Dragon Breath!?" Gray follows.
Then as to be expected, Natsu and Gray start fighting.
"Um, is this normal?" Baljeet asks.
"Oh yes, we should have seen this coming." Carla answered.
"At this rate we're never gonna catch the mystery person." Lucy said.
Later, Natsu and Gray are done fighting.
"Well I guess I'll pick," Gray randomly picks, "looks like Adyson, Katie, and Baljeet are with me."
"I guess it's my turn," Wendy said.
Wendy end up paired with Buford, Ferb, and Holly.
"Well everyone let's get to know each other more while we're at it." Wendy suggeted.
"Well, looks like we are paired with the last ones, Milly, Ginger, and Gretchen." Lucy said.
"All right, we investigate the casinos and see which one the mystery person is in." Natsu said.
Meanwhile, somewhere far away another portal opens up unexpectedly.
"Wow, so this is Earth Land, let's hope there's no Good vs. Evil so I can start the Evil, and no Good to stop me." Doofenhmirtz said.
"I'm sorry, but Good vs. Evil does exist in this world, and I don't like it." said a strange voice.
"Looks like someone shares your thoughts, sir." Norm said.
"Hey, who are you are you good or are you evil?" Doofenshmirtz asks.
Then a talking staff with a skull attached to it appears out of nowhere.
My name is Klodoa, and I am evil like you." the talking staff answers.
"Wait, how is a cane alive, oh wait magic, duh." Doofenshmirtz realizes. "So if you're evil, do you have a nemesis?"
"I actually have more than one nemesis, I got a whole group of nemesis." Klodoa answers.
"Cool, so you have some nemesis too, how are they like, fierce, animal instincts?" Doofenshmirtz asks.
"They are actually human, and I was once part of a fearsome Dark Guild known as the Oración Seis, until we were wiped by Fairy Tail and other guilds in their alliances, then the Oración Seis was reborn as the Neo Oración Seis, but we were once again defeated by Fairy Tail. Klodoa explained.
"Wow, nice backstory, well back in my universe, my nemesis is Secret Agent, Perry the Platypus." Doofenshmirtz said. "Say, what if I helped you defeat this Fairy Tail guild, and then we go back to my universe, and you help me conquer the Tri-State Area?"
"Sounds interesting, if you help me defeat Fairy Tail, I will help you conquer this Tri-State Area." Klodoa says in agreement.
Meanwhile, back at Doofenshmirtz Evil Incorporated, Agent P's ice trap is starting to melt.
Who's this mystery person that causes trouble at casinos? What's Doofenshmirtz and Klodoa planning? Will Agent P stop their plans? To be continued...