Question

how would use the ring target? Fling?

Answer 1

The ring target makes the holder affected by moves that wouldn't normally hit it, so for example, if a pokemon used earthquake it would hit a pokemon with levitate if the latter was holding the ring target.
Also, the ring target gives fling a base power of 10

Source: http://www.serebii.net/itemdex/ringtarget.shtml

Comments

so if my pokemon were holding the ring target he would effect gengar with earthquake.

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No, your earthquake would hit gengar if gengar was holding the ring target, not your pokemon. In all, the ring target is a useless item.

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oh thank you yeh that is bad but there is a specical move that can swap items but that is if you happen to hold a ring target.

Answer 2

You would use Trick.

Answer 3

You would use one of these moves:

• Trick
• Bestow
• Switcheroo

Opponent could use:

• Covet
• Ability Pickpocket