That is, they're presented as cards all their own rather than using the Godzilla cards method of having the Godzilla card be essentially an alternate skin, as shown below here: This was a sweet and elegant solution that could have easily been applied here - even if they were to cards that didn't already exist
These cards are never going to cripple a Dredge player, but they are always going to do something effective
With this move I wish Mewtwo's retreat cost wasn't so high because I would get the defending Pokemon asleep as fast as possible then move in a Pokemon like Snorlax who has moves that does more damage if the defending Pokemon is asleep, if somehow I could get retreat costs to be much lower for all Pokemon I would switch back and forth between Mewtwo and another card quite rapidly
As a general rule, any sort of full-art card with a popular character on the front will be worth something
There are tons of ways to use it to make infinite mana, with Vizier of Remedies, Swift Reconfiguration, and Solemnity coming to mind