Dont use grass idiot.
Of course, a Grass type Pokémon can defeat a Bug type Pokémon. But Grass type moves are "Not very effective" against Bug type Pokémon, meaning the power of the Grass type move is halved.
Get a grass type Pokemon, i did it with feraligatr but grass type will help with kingdra and gyarados.
believe
The best way to defeat Marlon is to use an Electric or Grass type since his team is of the water type.
get a grass type pokemon, it can defeat water type. but be carefull of fire types.
using a powerful water and grass type
you need a fire type a water type a dark type a grass type and a dragon type.
Use Dragon Tail or a strong electric or grass type attack .
If on Pokemon diamond or pearl you defeat wake the water type at pastoria city.Use grass type!If on platinum you defeat maylene the fight type at veilstone city!Use fly type!
u don't get it you defeat her, she's a gym leader. first you go up the cable car after you helped dr.cosmo out in the meteor cave then go to the cable car and defeat Maxie them go threw the jagged path and you will get to lava-ridge where flannarys gym is.
Water, ground, grass, steel, and fighting types are good.
Use grass and fighting type pokemon.