MY AWESOME TEAM:

Raichu (Final, Electric)
Oddish (Basic, Grass/Poison)
Magnemite (Basic, Electric/Steel)

Magnemite vs. Staryu
Both basic, but Magnemite is Electric and therefore super-effective. WIN.

Oddish vs. Psyduck
Both basic, but Oddish is Grass and therefore super-effective. WIN.

Raichu vs. Starmie
Both final, but Raichu is Electric and therefore super-effective. WIN.

Eat that, Misty!