I'm making a team but I don't know if I should use galvantula or ferrothorn
In-game, ferrothorn is almost useless. In competetive battling he is very good, though.
Galvantula is very fast and strong, so he is very effective in-game. I used him in my white 2 team. I reccomend using this set:
item: expert belt
nature: timid/ modest
Galvantula is amazing in-game. He crushes the 8th gym and proves very useful for the elite four
Ferrothorn has higher overall stats and high defense and sp defense
With 9 resistances, I immunity and 2 weaknesses
It has the ability iron barbs which is not that bad.
But galvantula with lower stats ( not a big difference ) has high speed and a not bad sp attack
With 4 resistances and 2 weaknesses
But the main thing about galvantula is its ability compound eyes which increases accuracy by 30% increasing the accuracy of thunder.
Therefore I suggest galvantula due to its ability speed sp attack and lack of a 4x weakness which gives it the edge.
Hope I helped.