I'm also trying to get through without cheats, so there's that >_< and creating my own world in order to scan missing monsters worked for the "scan" goal, but for some reason self-created worlds don't count towards the coin or "defeat monsters" goal... oh well X3 keep looking for a level with one that includes powerups I guess, thanks for the confirmation ^^
and yeah, years ago I also used Moron for coin, I might end up doing that again but there's some good levels that give you crazy coin as well.