I feel like this could potentially be a good card in the future... depending on what cards come out. What you really need is Pokémon Catcher or something to raise retreat cost (or something that damages Pokémon that retreat, such as Dugtrio (Platinum).
The problem is, there's nothing HGSS-on that can really do that. So you have some options that might be alright...
-Scizor Prime could be an alright wall. Poison, then retreat to Scizor next turn, and wall with Special Metal energy and maybe some healing. It could work, I'd just watch out for Emboar.
-Steelix Prime works as well, but you don't get the benefit from blocking special energy. On the other hand, it does have higher HP, so it's not all bad.
-You could include some Pokémon Reversal and hope for the best on coin flips. You never know, it would probably get a prize or two. And while they have a Pokémon stuck active, you could set up one of the above two cards. Or something else. Maybe we'll get a good wall in some BW set.