Yeah, I know, but I like to train with the pokemon instead of just leave it in my party while I'm using my higher level pokemon. It doesn't give me that feeling like "hey! I trained this form level 1 to 100"Jolteon guy, actually you use your best pokemon to beat the elite four with exp share on the pokemon you want to train.
The highest pokemon i got training from level 1 is 73. From level 70, 78. From level 90 (magikarp, super rod in the resort area - level up 1 and it turns into the dragon) to level 91 (rare candy lol)
I'm not a expert, but I can help. (The thing on the poketch that helps you find hidden items really helps)