There was a Choice Band equivalent for def and spdef???
Funnily enough I was thinking about this on the way to school this morning. I don't think they'd be used. So many Walls and Tanks rely on Leftovers to work so much better, it's invaluble. Most physical / special Walls and Tanks are what they are because they can take hits without needing a boost anyway.
What about a muscle band equivalent for these?
Que tal granadino! jeje
Walling wouldn't be that effective, seriously, walling is based in being able to use several moves that work well together like taunt, rest, damaging moves, status. Being locked into one move sucks when deffending.
You rest forever? ok, i'll set up in your face, or i'll switch an opposite attack based sweeper that you can't touch.
Being trapped would very dangerous. But we can't discuss this topic, specially since those items don't exist, and we can't correctly predict how they would affect the metagame.
This would work pretty well with Toxistalling and healing moves. I could see it being used.
Oh, and obligatory lol Choice HP Item. Imagine blissey with like 1000 HP. O-o