I hate pears. They're basically apples with a crappy texture.
Anyway, no, the games are still so stupid that you can't GIVE things from one to another. Unless My Pokémon Ranch lets you put 'em in and take 'em out from different games, but I doubt it, the console games have been fascists for a long time now. By today's standards it's alarming how much bull[dukar] you could get away with, and counted as legitimate, thanks to Pokémon Stadium 1 and 2.
-Any item meant to be held by a Pokémon, like Leftovers, Quick Claw, anything that powers up moves,
-Any TM that teaches a move worth using
-PP Ups and PP Maxes
-Basically everything!
Good luck with Nuzlocke-ing