Well, the obvious appeal of this card is in the second attack. Auto-paralyze is nothing new to the game, but it's fairly new to this format (Gliscor and Tentacruel being the only other examples). It's also important to note that this format lacks Warp Energy, Unown G, or any other effective way to break this lock, save Espeon. Because Switch is so heavily-played, pairing this card with Vileplume is a must. Sunflora can search your Accelegor out very easily after they go back to the deck.
Unfortunately, there's no way to reliably keep the energy on this card every turn since it always returns the energy to the deck. Celebi Prime, Skyarrow Bride, and Double Colorless Energy can help with the double attachment every turn, but it's very hard just to get the energy in your hand turn after turn. There isn't an effective way to do this, which is why the card will remain fairly unplayable, at least for now. Interviewer's Questions, Twins, and/or Cilan are literally the most reliable methods available, which is pathetic.
Still, at least the card is interesting and not just boring filler.