One excellent idea I have is to have invisible command blocks that play every time you pass through them. Only, keep reading to understand fully before jumping to conclusions! If you're within say 1 blocks away from an enemy, it runs a command. If you're outside the range, it doesn't count. For example. I have an enemy that I want to be picked up. As all of you know, we can't do that. But with this, you can! I have a character sheet (for example) that has the character holding the enemy. Like a turtle. When the character gets within 1 block of the enemy, it instantly changes the character and deletes the enemy. Making you think the character picks up the enemy. If the suggestion for holding keys and letting go of them gets taken, then I can use a button instead. Make sense?
