For example , a Fire-type PokÃ mon is at a disadvantage to a Water-type , but has a large advantage against a Grass-type . Dual type PokÃ mon can also suffer from double weaknesses . For example , since Fire-type attacks are super effective against both Grass-types and Bug-types , Parasect , a Bug - and Grass-type PokÃ mon , would take quadruple damage from a fire-type attack .