Golem - Mythical Island

Golem's Mythical Island variant is easily on a par with many EX cards. It has a relatively high base HP at 160, an attack that hits for 120 damage, and the tremendously useful advantage of taking -30 damage from enemy attacks every time that it launches its own attack. Cap this off with free energy gains from Brock - Genetic Apex #224 [U], and you've got a card that's actually pretty threatening and easier to set up than it seems.

But, on the other hand, Golem is still a 3-stage evolution that takes 4 energy to run and has a 3 energy escape cost, meaning you'll PROBABLY want to run it alongside Leaf - Mythical Island #068 [U] in order to make sure its run doesn't end prematurely. it also has direct competition in Machamp EX, which has similar setup, but higher immediate HP, lower energy cost (but no dedicated card to grant it energy), and the same damage output. However, Golem will tend to be better at tanking hits from weaker opponents if it can get off an attack.