My Team:
(Grass/Poison, Basic)
(Water, Basic)
(Water/Poison, Final)

Round 1:
Vs
Both are Basic, but Bulbasaur has a type advantage (Grass Vs Ground). Bulbasaur wins.

Round 2:
Vs
Both are Basic, but Squirtle has type advantages (Water Vs Rock and Water Vs Ground). Squirtle wins.

Round 3:
Vs
Both are Final, but Tentacruel has type advantages (Water Vs Rock and Water Vs Ground). Tentacruel wins.