Happens when the pokemon has way to exp at its level. Keep fainting pokemons until the blue exp bar rises
All poke in slow and erratic exp groups are caught with an exp total too low for their current level
They do earn exp, but need more exp than they should for their first level up, and their blue exp bar will not display correctly until their total exp catches up to where it should be for their initial level
Bulbapedia page "experience" has a table showing total exp requirements
Keep leveling.
All poke in slow and erratic exp groups are caught with an exp total too low for their current level
They do earn exp, but need more exp than they should for their first level up, and their blue exp bar will not display correctly until their total exp catches up to where it should be for their initial level
Bulbapedia page "experience" has a table showing total exp requirements
Keep leveling.