Favorite non-damaging, non-healing move

Thunder Wave has always been my favorite for this category. It helps me in sticky situations. I can move first and the enemy can't because they are too paralyzed >:D (most of the time anyway)

Will-O-Wisp
Its a nice way to give you some nasty damage as well as cripple an attacker.

I really like nasty plot just for the sound it makes

I really like Mean look as it really helps with roaming legends.
also there is forsight which really helped me when fighting ghosts.

I love how a lot of people said toxic when the OP said non-damaging, non-healing, and non-status ailments XD

Anywho, my fav has to be sand-attack. Lower opponents accuracy? Heck yes! I spam the crap out of that when fighting Red (which is as bad as it sounds XD ), especially when he pulls out snorlax.

Swords Dance/Nasty Plot make me feel so strong. I hate Attract, especially on the enemies...

I really like Cotton Guard and Dragon Dance, but unfortunately, the only only Pokemon that can do both of these is one of the Pokemon I hate the most. (Altaria if you didn't get where I was going with that)

Spore is great because it puts the opponent asleep.... 100 % accuracy!

Swords Dance/Dragon Dance/Nasty Plot/Cotton Guard.

All really great moves used correctly.

My favorite non-damaging and non-healing are Swords Dance, Dragon Dance, Quiver Dance, Nasty Plot and Cosmic Power.

They're all boosting move, they're very useful if you use them the right way.

Sand-Attack: I find this to be REALLLLY useful. But, just as a side note, because I feel I need to say this. I ABSOLUTELY LOATHE the move Attract.

I like Dragon Dance a lot, boosting both attack and speed at the same time...awesome :D