General description: This card is somewhat tricky to run and many of you may remember it from the first few sets of the game. Well, it's kinda back...
Uses: This card lets you de-evolve one of your evolved pokemon into its previous stage. Sound lame? It could be, without the proper strategy. Let me explain below.
Strategies and game play: You can use this card with an eevee deck really well. Since you can only run four eevees in your deck, this allows you to manipulate what type you want eevee's evolution to be. An example would be if you needed to use a flareon in your hand but you already have an umbreon. De-evolve, wait a turn and then re-evolve into your flareon. another situation is if you run a deck that uses branching evolution paths, such as kirlia or snorunt, allowing you to evolve into one stage for awhile and then switch into the other when you draw it.
Combos with other cards: Works very good with eviolite for stage 1 evolution decks. De-evolve and then put an eviolite down so your pokemon can survive longer, then you can re evolve when you want.
Ways to counteract it: Adding a ton of damage to your opponent's pokemon, at least enough to equal the hp of the pokemon directly under it, completely cuts this card off from being used. Trainer locks also hurt this card so Vileplume from one of the hgss sets will take this card and many other trainers down and out.
Strengths/Pros: It's a trainer, so it doesn't take up your supporter for the turn. You can also change an evolution if your pokemon can evolve into multiple pokemon. Good to work with eviolite too.
Weaknesses/Cons: If your previous stage would be knocked out because of excessive damage on your target, don't run this. You'll knock out your own pokemon. That is the biggest weakness to this card. Another weakness is that you have to wait a turn before you can play this card. That makes your previous stage more vulnerable to damage, depending on where it is at (bench sniping for de evolved bench pokemon, strong attacks from de evolved active pokemon) Vileplume that stops trainers.
Variations: I can't remember which set this one in back in the beginning of the game, but it was now re-released for the current format in Dragon's Exalted.
Artwork and aesthetics: Plain. It shows the tool and that's it. I'd rate it the artwork a 4/10 because of the bright yellow.
Overall rating: I would rate this card a 5/10. It has some uses in some decks, but not in all decks and the disadvantages are about equal to its advantages.