Ideal Moveset for Metapod:

Bug Offensive Type Effectiveness
V          Bug Type Moves are Super Effective Against:
Dark Grass Psychic

X          Bug Type Moves are Not Very Effective Against:
Fairy Fighting Fire Flying Ghost Poison Steel

Bug Defensive Type Effectiveness
V          These Types are Not Very Effective Against Bug Pokemon:
Fighting Grass Ground

X          These Types are Super Effective Against Bug Pokemon:
Rock Fire Flying

Metapod Fig. 1