Some people played Bellossom in Vileplume/Vanilluxe to put onto the other Oddish that didn't get knocked out. It healed 10 damage from all your Pokemon each turn, so while your opponent was paralyzed by Vanilluxe, you could heal a ton of damage off.
You shouldn't get points deducted, I don't think. As long as you're not super crazy about it, you should be okay. That would fall under the "Believability/Playability" category.