Rulings

You may move counters from any number of other creatures you control, not just from one.
You choose which counters to move as Slippery Bogbonder's triggered ability resolves.
You may choose to move zero counters.
If Slippery Bogbonder's triggered ability puts a hexproof counter on a creature an opponent controls, you can still move counters onto that creature.
You can't move counters from the target creature to itself.