You don't need a badge to get strength but you need a badge to use strength and that badge is the rainbowbadge and that is the 4th one in celadon city.
The mine badge.
For DPPt, the 6th.
You need the cobble badge.
The fourth one.
You don't need a badge to get strength but you need a badge to use strength and that badge is the rainbowbadge and that is the 4th one in celadon city.
The mine badge.
For DPPt, the 6th.
You need the cobble badge.
The fourth one.
You need the rainbow badge which you get a celadon city Hm cut is needed.
You need the 4th badge first to use it.
You can use the move strength in Pokémon to move boulders. You can use strength in FireRed after getting the rainbow badge.
You need the Cobble Badge.
well u have to had your forth gym badge.
Teach it the HM move Strength. You will also need the badge from Celadon City which will allow you to use Strength outside of battle.
You need the soul badge that is obtained from defeating the Fuschia city gym leader Koga in order to use surf outside of battle.