Ampharos EX is pretty good. The first attack, Thunder Rod, doesn’t do any damage, but lets you look at the top 4 cards of your deck and attach any Lightning Energy you see there onto Ampharos EX. If you happen to just find 2, that’s well worth it, as the second attack costs 2 Lightning Energy and 2 colorless. Sparkling Tail deals 100, but it ignores Weakness, Resistance, or any other effects on the Defending Pokemon. Considering that this hits so hard quickly, if I were still playing the TCG, this would be one of my main heavy-hitters.
While I don’t play the Pokemon TCG anymore, I’d consider having these cards around in my collection. If you do play the game, I’d highly recommend finding some way to make these work. They seem too powerful not to play.