How do you beat poke cup ultra ball with rental Pokemon

The Ultra Ball round of the Poké Cup.
Here's the best (Yes, I'm 99% guaranteeing you success with this) lineup I've come up with. All abilities considered among EVERY rental Pokémon in the Poké Cup, your team is as follows:

Raichu - Your starter in most of the matches. Reliable moves and speed.
Arcanine - Good stats. All-around decent pick.
Alakazam - Highest speed. THE psychic type of the Red/Blue/Yellow era. Also versatile.
Golem - Solid defense and a couple powerful moves you'll need.
Starmie - VERY good versatility and moveset.
Psyduck - Believe it or not, Psyduck has the most well-rounded attack types. However, its HP isn't the greatest.

Three of these Pokémon have Dig, which is very useful, so use it often. Feel free to tweak this team. But I KNOW these ones will win: I used this same team for all four rounds of the Poké Cup, undefeated.