i'm probably barking up the wrong tree here, but have you ever played diablo 2?
there was this one thing that people did where a max level character will join a game hosted by a low level character (usually a buddy or someone who felt like helping out) and walk him through the quests and kill everything while the low level character stood in the corner and got the experience from the high level mobs and do that for all three dificulties - normal, nightmare and hell. and by the end of all that the low level character was basically pretty high level and he could go on farming for gear and loot and shit on his own.
in bulgarian we had one single word for that whole process. is there a word for it in english or is it just "help leveling"