>Psychic/Dark/Grass
Insecticides would be your best friend.
>Ice/Steel/Bug
Just stay cold, forever...
>Water/Ground/Rock
Desolation is nice, right?
>Dragon/Fighting/Dark
Cuteness is avoidable, I hope.
>Bug/Fire/Flying
So, you like rocks?
>Grass/Ground/Flying
Despite being Lando 2.0, Ice cucks you still.
>Electric/Fire/Rock
Note to self: Levitate only.
>Steel/Dark/Rock
Physical combat just isn't for you.
>Fairy/Ice/Rock
Metal has been humanity's greatest ally.
>Bug/Fighting/Grass
Unlike Android 16, you hate birds.
Now, how about some quad-typed Pokemon? I'll suggest two.
>Grass/Ground/Flying/Dragon
What is that, 16x damage?
>Bug/Steel/Ice/Grass
With Dry Skin, 20x damage, and under sun, 30x damage. If the user of that move had a Charcoal held, it is boosted by 20%, so 36x damage, if I am correct. This is just like a Mewtwo using Flamethrower. If it was a fire type, that'd become a whopping 54x, accounting for STAB, and with adaptability, it was 72x. Tell me if anything went wrong here.