Kid Icarus is murderously hard (way moreso than Ghosts'n Goblins, the typical symbol of "extremely hard games"), to the extent that most people who played it back in the day seem surprised when told the game has sidescrolling levels, since they never beat the first world. The challenge lies in the unforgiving platforming, so I don't see how a player's guide would help much, either.
I've always been a big fan of RC Pro-Am and actually picked up the sequel a couple of months ago. My initial impression was that the game wasn't quite as good as the first, but I haven't really played it that much yet and need to give it another try. It's disappointing to hear that the multiplayer is pretty much worthless.