Methodx

Hello, i've occured a probleme in Hoenn ! My Timburr won a fight and leveled up from 49 to 51. But at the end of the fight exp seemed to have vanished and the tooltip of Timburr was still 49. Since it's completly messed up, he wins and loses level every fight as you can see on the pics below. It's a bit annoying because it's hard to gain exp in Hoenn region.. Could you help me please?