In theory, with a Naban, Dean of Iteration on the battlefield, you only need half the number of blue mana symbols on the battlefield to make Master of Waves good (for example, in the worst-case scenario where you have just a Naban, Dean of Iteration and a Master of Waves, you'll still end up with 10 power across five bodies, which is a pretty reasonable deal for four mana, and if you throw just one other Wizard into the mix, things cat get out of hand really quickly when Master of Waves' enters-the-battlefield trigger is doubled)
Even so, its always nice to get a look at the new card art for these Pokemon
This article explains the rarity structure, how to identify them, and the characteristics of popular cards that fetch high prices in the market
Pokemon Power to shift all her Grass Energy over to Exeggutor, who then uses it all to do a lot of damage with ?Big Eggsplosion
In Modern I think the RG Prowess deck is slightly behind the URx version (mostly because theres no such a card as Preordain)