So far 6 types are in the game: water, flying, fire, mineral, normal and special which are godlike.
Micromon Elements:
Fire:
Weak against - Water
Strong against + Flying
Water:
Weak against - Flying
Strong against + Fire
Strong against + Mineral
Flying:
Weak against - Fire
Weak against - Mineral
Strong against + Water
Mineral:
Weak against - Water
Strong against + Flying