My Charmeleon don't wins exp!?

[Matheuss000]

I've a Charmeleon level 16, but EVERY TIME I wins a battle (no a battle gym, a normal battle) he doesn't wins exp, appears on chat "Charmeleon gained 71 exp"(for example) but It dont adds on my exp bar. I'm trying to level up this Charmeleon by 10 minutes, and nothing. I've tried to relog, but nothing.. Someone knows how to help me?

 

P.S.: Sorry for my english, it isn't my "mother" language..

 

Edit 1: I tried to gain exp in route 1,2 and viridian forest, and I don't gained nothing. BUT, in Gym, when I beat a boy before the Brock I gained exp, but just in the Gym. WTF

[Singham]

Try leveling you Charmeleon where the levels of wild Pokemon are high like route 3 and Mt. Moon.