yeah it looks like that in yellow, and looks like a box in red and blue or something like that *I haven't played in a while*
Like i said, i think it's a glitch cheat
It'll up you pokemon's level to 136 or whatever and when it goes up another level, it's automatically at level 100. But it did something else besides that, i think you just had to beat it?
I know it did something with the second item in your bag or soemthing like that