This could refer to several things.

• ivy_(plant) - A collection of asterid vine plants.
• poison_ivy_(plant) - A rosid plant known for its irritating plant sap.

Characters:

• ivy_(aquafreeze) - dragon character
• ivy_bellerose - anthro leopard character
• ivy_burnbomb - anthro character
• ivy_(cavix) - anthro coyote character
• ivy_(chaossheep) - black and green anthro shark character
• ivy_duvall - anthro dire wolf character
• ivy_(k720) - possibly a mlp fan character
• ivy_mihalov - anthro fox character
• ivy_mashika - anthro cougar character
• ivy_(mav) - a mlp fan character
• ivy_(miso_souperstar) - salandit character
• ivy_o'neil - sonichu (series) character
• ivy_(outta_sync) - another mlp fan character
• ivy_(paganee) - another mlp fan character
• ivy_pepper - character from lackadaisy
• ivy_(piklz419) - pink anthro shark character
• ivy_(rickymarou) - green and white anthro character
• ivy_rose - another mlp fan character
• ivy_shun - anthro dog character
• ivy_(skunkphunk) - anthro skunk character
• ivy_sundew - character from amphibia_(series)
• ivy_(sweetfilthyfun) - another mlp fan character
• ivy_the_avro_arrow_(kiley177) - living aircraft character
• ivy_trellis - pink anthro character
• ivy_valentine - character from soul calibur
• ivy_geokut_(archibyte) - anthro bat character
• ivy_voix - anthro cat character
• ivy_(wildlord) - salazzle character
• ivy_(yolfrin) - white and blue dragoness character
• poison_ivy - DC Comics character

MLP Fan Characters:

• ivy_(k720)
• ivy_(mav)
• ivy_(outta_sync)
• ivy_(paganee)
• ivy_rose
• ivy_(sweetfilthyfun)

Artists:

• ivy_(artist)
• ivy_hollivana