u get to use certain HM's once u beat the gym leaders
Chat with our AI personalities
You can't.
All you have to do is beat gym leaders then the allow you to use HM's out of battle but ether before or after battling the gym leader. Good Luck!
In Pokemon series, you generally find HMs soon before or right after you beat gym leaders.
In Pokémon FireRed, for defeating Brock, his Badge will allow you the use of the Flash HM, Misty's Badge will allow you to use the Cut HM, Lt. Surge's Badge will allow you the use of the Fly HM, Erika's Badge will allow you the use of the Strength HM and Koga's Badge will allow you the use of the Surf HM.
HMs are these type of technique for a Pokemon to learn. You see those trees blocking some ways? You need the HM01(CUT) to cut those trees. But to be able to get those HMS you must defeat some of the Gym Leaders, like Brock and Misty. For example, Brock will give you the availability to give you HM05 FLASH (like a flashlight), but the one who will give you the CD (HMs are like a CD), is one of Professor Oak's Aides. You must catch at least 10 Pokemon, so he can give you that HM05 as the reward. And etc and etc,