What is a good counter for mammolania? Also would there be any team suggestions to have and go for?

Dio has 5 hp, 5 attack
Mammo one of each
Quetz only has 1 hp, 1 attack boost and 136 speed
Nemys has one of each
Testa has 1 speed
Tryko has 2 hp, 1 attack

Grypolyth and Thor beat it