Victini

Victini is a good Pokemon in 1v1 because of its Fire typing and its access to V-create, allowing it to beat common threats such as Magearna, Mega Charizard Y, and Genesect. Fire is generally a good offensive type and V-create is a supremely powerful STAB move, allowing Victini to beat many of the omnipresent bulky Steel-types, like Celesteela and Mega Mawile. Defensively, Victini's resistance to Fairy-type STAB attacks from popular Pokemon like Tapu Lele and Mega Gardevoir allows it to beat them when it's running a physical set. It can also be quite versatile with its base 100 stats across the board and nice movepool that includes moves such as Blue Flare, Celebrate, Magic Coat, Will-O-Wisp, and Glaciate, allowing it to run a variety of viable sets to beat diverse threats. A Z-Celebrate set can also be used to beat threats to the Choice Band set like Mega Charizard X and Kommo-o. By running a mixed attacker set, Victini is able to beat Zeraora reliably. It is also able to viably run Taunt for some stall Pokemon like Type: Null and Mega Altaria. However, Victini lacks decent spammable boosting moves, only having Z-Celebrate, Power-Up Punch, and Work Up, and, as a result, competes with other Fire-types like Mega Charizard X, Heatran, and Incineroar due to their ability to raise their damage output by using moves like Dragon Dance, Metal Sound, and Bulk Up. Furthermore, Victini's rather lacking offensive stats leave its coverage moves without much force behind them, meaning it loses to Pokemon that can withstand V-create and are too bulky for its coverage moves, like Mega Gyarados, Mega Slowbro, and Mega Tyranitar.