#1, Bulbasaur. Japanese name: Fushigidane.
Bulbasaur was the first Pokemon ever to be uncovered. Bulbasaur are known for the vines that sprout out of the unopened flower. Oddly, they barely use those vines when they are not in battle. Bulbasaur look for mates by producing a sweet smell. Males usually fight over females by having a Vine Wrestling competition - first to wrap a vine completely around their opponent wins. Bulbasaur diets consist of plants poisonous to humans and any plants. Crushed-up plants are best to feed a baby Bulbasaur.
Weaknesses:
Fire - x2 damage
Flying - x2 damage
Ice - x2 damage
Physic - x2 damage
Resists:
Electric - -2 damage
Fight - -2 damage
Grass - -4 damage
Water - -2 damage
Strategies against weaknesses:
Use moves that are not Grass-type and try and use Battle Items, like X Special Defence or X Defence to try and reduce the chance of a OHKO.