Ultimate Challenge Complete!
I want to start off by saying that if you haven't played White yet, and don't want it to be spoiled, then
don't scroll down. Anyway, I'll be playing White now with Serperior, Simisage, Lilligant, and Reuniclus. So yeah...here we go! :D
I start off by naming myself Inferno, like I normally do. Of course, I choose the female character. The game begins, and out of the nicely wrapped box, I choose Snivy. I defeat both Bianca and Cheren with ease. Snivy gets a critical hit on Cheren's Tepig, which sealed the deal. My room is a mess, and the other two go downstairs to apologize to my in-game mother. They both exit, and I follow after receiving the Xtransceiver.
I see Bianca going towards her home, so I follow. She gets yelled at by her father. It doesn't affect her that much, and she leaves. We head into Professor Juniper's lab. We all get a Pokédex. As soon as we exit, we also get Town Maps.
Those two race off to Route 1, and I follow. Juniper demonstrates how to capture a Pokémon. Once I'm free to do what I want, I capture a Pansage. Once I catch up with everyone, the Xtransceiver rings. Finally, I head to Accumula Town. I get introduced to the Pokémon Center. Then, I head outside. There is something going on, apparently, but for now, I ignore it and decide to train a little.
After this, I hear Team Plasma's speech, and defeat N. After this battle, I heal, and head to Route 2. I battle Bianca, and she is defeated very easily. I then arrive in Striaton City. I go into the Dreamyard, and battle the trainers. While doing this, my Snivy evolves into Servine. I also obtain a Panpour, but I plan to use it for Surfing purposes.
I head back to the city, where I prepare to face the gym leaders. I get through the trainers and the puzzle easily, then battle Chili.
After this, Fennel gives me Cut. I use this to go cut down the tree in the Dreamyard. I defeat the Plasma members and save Munna. Also, I go back to Fennel's house and get the Pal Pad and C-Gear (both of which I'm not going to need at all)
Next, I go to Route 3, and defeat several trainers, as well as Cheren. Also, the Team Plasma members are all defeated. Now, I can head south. I defeat some trainers, and end up in Nacrene City. At the Pinwheel Forest, I take out a bunch of trainers, and rack up the Experience Points. Finally, I'm ready to take on Lenora.
She's defeated quite easily, actually. Leech Seed was pretty helpful too. Anyway, Lenora's husband comes running to us. Team Plasma has shown up. They steal the skeleton's head, and run off somewhere. It's up to us to find them. I'm instructed to head off to the Pinwheel Forest. In there, I catch a Petilil. I begin to train it up as I defeat Team Plasma and get the skull back. I return it to Lenora. I cross the Skyarrow Bridge at this point.
As soon as I arrive in Castelia City, I evolve Pansage into Simisage with the Leaf Stone I obtain. I also help out Bianca, and challenge the gym.
Burgh isn't too tough. Anyway, I continue on. Bianca and Cheren are defeated once again, along with other trainers on Route 4. I make it to Nimbasa City, win against N and battle the Gym Leader. However, before that, I caught a Solosis at Route 5 and trained it up some. Also, I use the Sun Stone that is obtained in the town to evolve my Petilil into Lilligant.

(Solosis's Hidden Power was Ground. That = Instant Win)
I exit to Route 5, Cheren loses again, and I cross the bridge. Once there, I heal and find the Plasma members in the Cold Storage. I then head to the gym, and prepare for the incoming battle.

(Grass > Ground.)
I heal up my team, then head to Route 6 and battle Bianca. I obtain Fly. Clay helps me get into Chargestone Cave, so I enter and do some exploring. I see Juniper and Bianca, and get the Lucky Egg, which I use for training. Also, I clear out the cave of Team Plasma, and exit. Seeing that the Gym Leader isn't here, I head to the Celestial Tower, and climb it, while battling many trainers. In one of these battles, Servine evolves into Serperior. I head back to the city, and defeat Skyla.
(I forgot completely this time about a screenshot.)
Anyway, I defeat Cheren near Twist Mountain, then I begin to scale it. It takes some time, but I finally reach the other side. I enter the gym, and solve the lengthy puzzle in order to fight the leader, Brycen.
At that point, my team is very high in level. (Lucky Egg ftw) Also, my Duosion has evolved. This battle is pretty straightforward, Psychic owns. I go out, heal, and head to Dragonspiral Tower. I scale it, defeating Team Plasma members. I see N, and now I must head to Relic Castle. There, I do the same thing, defeating Plasma members. After everything is said and done, I have to head to Nacrene City. I receive the Dark Stone, and head to Opelucid City.
I eventually get there after defeating several trainers, including Bianca. I solve the
long puzzle in the gym, and prepare to fight Iris.
This battle took some time, but ultimately, with some Revives and Potions, I win. (I have little to no diversity in my team...xD) After this, I head to Route 10 and Victory Road, defeating Cheren once again on the way there. I finally reach Victory Road. (Which is awesome in this game) After a few battles, I also reach the E4, where I prepare to battle. I save, and take it on.

(Timing was off, lol.)
Finally, all the battles are done. However, I soon have to face N! After watching the castle rise from the ground, I enter it, ready to win. I do capture Zekrom, but I made sure that my party was full so it wouldn't automatically enter my party. (Otherwise, it goes to the first slot position automatically)
(I was so focused on this that I apparently forgot another screen, my bad.)
After all is said and done, I defeat a very confused N, then a very evil Ghetsis.
This means the challenge has reached it's end, and my Ultimate St. Patrick's Day Challenge is completed...all before the actual day! :D
The Final Team

Serperior Lv. 52
Leaf Blade, Coil, Slam, Leech Seed

Simisage Lv. 57
Leech Seed, Fury Swipes, Bite, Seed Bomb

Lilligant Lv. 54
Quiver Dance, Leech Seed, Sleep Powder, Petal Dance

Reuniclus Lv. 54
Psychic, Hidden Power (Ground), Recover, Endeavor