Hey, that's what you're here for, right? To help out us regular members. xD
Every 20 levels sounds good, now I need to get some sleep before I pass out at my computer.
Lol, that's alright.
About the challenge, do you think changing the updates to every 10 levels the Pokemon gains would be better? And possibly asking the challengers to take pictures and post them with each update? That would be enough evidence to know that they are playing the game properly, right?
Uh oh! A new challenge has appeared for the new Mod! XD
'Nothing ventured, nothing gained', as they would probably say. ^^;; I can look it over for you though, so drop me a PM with the details of what you're wanting the challenge to be.