Yeah, I made that same mistake myself
"T-B",
I made that same mistake myself using Skyridge's Misdreavus. I actually had a lot of success using that stragegy, defeating my 12 year old son numerous times with it. (I had it in a Psychic deck with some Gardevoir and Gardevoir EXs). When one would accumulate excessive damage, I would bench it and pull Misdreavus out.
Then, when we went to a local Wizards to play someone there said that you can only count the number of POKEMON that have damage on them, and not the total number of damage counters themselves.
Since then I've been using Expedidtion's Chansey the same way. It is a colorless basic that has 90 HP.
It has two attacks. The second, Dogpile, uses 3 colorless energy cards and reads:
"Count the number of Poke'mon on your Bench. This attack does 10 times that number of damage to the Defending Pokemon, and Chansey does 10 times that number of damage to itself."
Now, the unfortunate thing here is that there's a chance Chansey will knock itself out in addition to the defending Poke'mon if it uses this attack. However, if you're careful with its use, it can help you out in a battle.
I've added ioto a Water deck that I've composed, that has Wailord EXs. Once one of my Wailord EXs have accumulated good amount of damage I switch or retreat it, pull out Chansey and do its Dogpile attack.
Although it's more than likely going to KO itself, if it is going up against an EX card you will end up taking two prizes to your opponent's one.
In addition, if it's going up against a Pokemon that's been evolved and powered up (and the opponent doesn't have much of anything else on their bench to "come out at play" next then this can help change the momemtum in a game.
I would usually try to use it only in these two cases, or when I'll get a distinct advantage in using it.
- Tony