In Generation 1 (Red, Blue, Yellow) Bug is super-effective against Poison, and Poison is super-effective against Bug.
Weedle
Kakuna
Beedrill
Venonat
Venomoth
dragon and ice is most efective against dragon.
Bug types and dark types and ghost types are super effective.
There are three types that are super effective against psychc pokemon. They are Dark, Ghost, and Bug. If you need any other information type in psychc types on Wiki
Both Fighting types and Bug types are super effective against Dark types.
Are you asking what type of pokemon is super effective to bug type? The correct answer: Fire type
Fighting and Bug types are super effective.
Poison and Steel types are super effective against Fairy types.
ground type Pokemon are super effective against poison type Pokemon.
Psychic and flying types are super effective against fighting types.
normal type Pokemon are not super effective against any type.
Basically the only weakness is water, other types are normally effective or not effective on fire at all.
Psychic Pokemon are Super effective by Bug type, Dark type and Ghost types