Okay, so first, a Choice set is a must for Victini. I don't see any reason why any Victini analysis would exclude it. Now, I thought of including a Defensive set. It's pretty cool, and is better against Breloom than the Choice set is. Plus, Victini has a good support movepool, so why put that to waste?
I'll work on Set Comments, AC, OO, and C&C later, I have homework I need to do that I've been procrastinating on.
[Overview]
<p>Victini has a niche in the Dream World metagame that very few Pokemon have: It resists both of Breloom's STABs. It is the only non-Uber Pokemon in Dream World that can learn V-create, one of the most powerful moves in the game. This fact combined with its access to U-turn lets it pull off a deadly Choice set, and with base 100 stats all across the board, neither its offenses nor its defenses are bad. It also learns a plethora of useful support moves such as Will-O-Wisp, Toxic, and Taunt, which means Victini can also take on a supportive role.</p>
<p>Despite these advantages, Victini ultimately has its downfalls. Its Psychic / Fire typing is a bad typing defensively, leaving it weak to all forms of entry hazards and giving it a nasty weakness to Pursuit. It also makes it easily exploitable by Chandelure. Although none of its stats are bad, none of its stats are great, either; Dragonite and Salamence are both more powerful than Victini and overshadow it as a Breloom check due to their 4x resistance to Bullet Seed, compared to Victini's 2x resistance. Regardless of the advantages the two of them have over Victini, access to V-create and a good support movepool is enough of a reason to use Victini.</p>
[SET]
name: Choice
move 1: V-create
move 2: Brick Break
move 3: Fusion Bolt
move 4: U-turn / Shadow Ball
item: Choice Scarf / Choice Band
ability: Victory Star
nature: Jolly / Naive
evs: 252 Atk / 4 SpD / 252 Spe
[SET COMMENTS]
[ADDITIONAL COMMENTS]
[SET]
name:
move 1:
move 2:
move 3:
move 4:
item:
ability:
nature:
evs:
[SET COMMENTS]
[ADDITIONAL COMMENTS]
[Other Options]
-Defensive set
-Final Gambit
[Checks and Counters]
I'll work on Set Comments, AC, OO, and C&C later, I have homework I need to do that I've been procrastinating on.

[Overview]
<p>Victini has a niche in the Dream World metagame that very few Pokemon have: It resists both of Breloom's STABs. It is the only non-Uber Pokemon in Dream World that can learn V-create, one of the most powerful moves in the game. This fact combined with its access to U-turn lets it pull off a deadly Choice set, and with base 100 stats all across the board, neither its offenses nor its defenses are bad. It also learns a plethora of useful support moves such as Will-O-Wisp, Toxic, and Taunt, which means Victini can also take on a supportive role.</p>
<p>Despite these advantages, Victini ultimately has its downfalls. Its Psychic / Fire typing is a bad typing defensively, leaving it weak to all forms of entry hazards and giving it a nasty weakness to Pursuit. It also makes it easily exploitable by Chandelure. Although none of its stats are bad, none of its stats are great, either; Dragonite and Salamence are both more powerful than Victini and overshadow it as a Breloom check due to their 4x resistance to Bullet Seed, compared to Victini's 2x resistance. Regardless of the advantages the two of them have over Victini, access to V-create and a good support movepool is enough of a reason to use Victini.</p>
[SET]
name: Choice
move 1: V-create
move 2: Brick Break
move 3: Fusion Bolt
move 4: U-turn / Shadow Ball
item: Choice Scarf / Choice Band
ability: Victory Star
nature: Jolly / Naive
evs: 252 Atk / 4 SpD / 252 Spe
[SET COMMENTS]
[ADDITIONAL COMMENTS]
[SET]
name:
move 1:
move 2:
move 3:
move 4:
item:
ability:
nature:
evs:
[SET COMMENTS]
[ADDITIONAL COMMENTS]
[Other Options]
-Defensive set
-Final Gambit
[Checks and Counters]