normal type Pokemon are not super effective against any type.
Fire and steel types are super effective against Ice Pokemon. Electric, although super effective against water, do only normal damage to Ice Pokemon
Fighting-type moves are the only type moves that are super-effective against Normal-type Pokemon. All other moves are moderately effective and Ghost-type moves are completely ineffective.
Steel is super effective against rock type pokemon.
One of the posible answers is fire type pokemon. Fighting type is super effective
ground type Pokemon are super effective against poison type Pokemon.
Flying and Psychic are super effective against fighting
Ghost and Dark attacks are super effective against Ghost type pokemon.
Rock, electric and ice are super effective against flying type pokemon.
Fighting is super effective against Dark, Normal, Steel, Rock and Ice
Water and Grass attacks are super effective against Onix.
Phycic pkm are super effective against fighting pkm. and flying larson
Any fighting type pokemon can take on Blissey with no issues because it's a Normal Type pokemon and Fighting moves are super effective against Normal Types.